Help Guide Wireless Stereo Headset WI-C400 Use this manual if you encounter any problems, or have any questions. This Help Guide is also available as a PDF, which can be downloaded here.
Available operating time Checking the remaining battery charge System requirements for battery charge using USB Turning on the headset Turning off the headset Making connections How to make a wireless connection to BLUETOOTH devices One-touch connection (NFC) compatible Android devices One-touch connection (NFC) with a smartphone (Android 4.
Listening to music from a device via BLUETOOTH connection Controlling the audio device (BLUETOOTH connection) Disconnecting BLUETOOTH connection (after use) Supported codecs Making phone calls Receiving a call Making a call Functions for a phone call Disconnecting BLUETOOTH connection (after use) Using the voice assist function Using the voice assist function (Google App) Using the voice assist function (Siri) Important information Precautions Trademarks Customer support websites Troubleshooting What c
Unable to connect the headset to a BLUETOOTH device with one-touch connection (NFC) Unable to make a BLUETOOTH connection Distorted sound The BLUETOOTH wireless communication range is short, or the sound skips. The headset does not operate properly.
Help Guide Wireless Stereo Headset WI-C400 What you can do with the BLUETOOTH function The headset uses BLUETOOTH® wireless technology, allowing you to listen to music or make phone calls wirelessly. Listening to music You can receive audio signals from a smartphone or music player to enjoy music wirelessly. Talking on the phone You can make and receive a call with your hands free, while leaving your smartphone or mobile phone in your bag or pocket.
Help Guide Wireless Stereo Headset WI-C400 About voice guidance You hear voice guidance in the following situations via the headset.
Help Guide Wireless Stereo Headset WI-C400 Checking the package contents After opening the package, check that all items in the list are included in the package. If items are missing, contact your dealer. Numbers in ( ) indicate the item amount. Wireless Stereo Headset (1) Micro-USB cable (approx. 50 cm (19 3/4 in.)) (1) Hybrid silicone rubber earbuds (SS/S/M/L 2 each) Size M earbuds come attached to the headset.
Help Guide Wireless Stereo Headset WI-C400 Replacing the earbuds The headset comes with the M size earbuds. If the headset tends to come off or you feel a lack of low frequency sound, change the earbuds to another size to fit your right and left ears comfortably and snugly. A: SS size (one line) B: S size (two lines) C: M size (three lines) D: L size (four lines) 1 Remove the earbuds. Do not pinch the end of the earbud when removing it. 2 Attach the earbuds.
Help Guide Wireless Stereo Headset WI-C400 Adjusting the cable length You can adjust the cable length by using the cable adjuster to fix the cable. Slide the cable adjuster to fit the headset to your head. You can put the right and left units on the headset body when you do not use the headset. Put the stopper into a hole to fix the units.
Help Guide Wireless Stereo Headset WI-C400 Location and function of parts 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. left unit Earbuds right unit Stopper R mark Cable adjuster You can adjust the cable length by using this adjuster to fix the cable. N-mark Tactile dot The left unit has a tactile dot. L mark Built-in antenna A BLUETOOTH antenna is built into the headset. Indicator (blue/red) Lights up in red during charging.
15. Micro-USB port Connect a computer to this port with the supplied micro-USB cable to charge the headset. 16. Microphone Picks up the sound of your voice when talking on the phone.
Help Guide Wireless Stereo Headset WI-C400 About the indicator You can check various statuses of the headset by the indicators.
For details, refer to “Initializing the headset to restore factory settings.” Hint When the remaining battery charge becomes low, the indicator turns from blue to red, except for pairing mode.
Help Guide Wireless Stereo Headset WI-C400 Charging the headset The headset contains a lithium ion rechargeable battery. Charge the headset using the supplied micro-USB cable. 1 Open the micro-USB port cover. 2 Connect the supplied micro-USB cable to the headset, and then connect the other end to a booted computer. The indicator (red) of the headset lights up. Charging is completed in about 4.5 hours (*) and the indicator (red) goes off automatically.
If the computer enters into hibernation mode while connected to the headset, charging will not be completed properly. Check the setting of the computer before charging. The indicator (red) will go off automatically if the computer enters into hibernation mode. Charge the headset again in this case. The headset cannot be operated (turning on, BLUETOOTH paring and connection, music playback, etc.) while charging or if kept connected to the computer after charging is complete.
Help Guide Wireless Stereo Headset WI-C400 Available operating time The available operating times of the headset on a fully-charged battery are as follows: BLUETOOTH connection Music Playback time (SBC/AAC): Max. 20 hours About 60 minutes of music playback is possible after 15 minutes charging. Communication time: Max. 20 hours Standby time: Max. 200 hours Note Usage hours may be different depending on the settings and conditions of use.
Help Guide Wireless Stereo Headset WI-C400 Checking the remaining battery charge You can check the remaining battery charge of the rechargeable battery. When you turn on the headset or press the button while the headset is on, the indicator (blue) flashes two times, then the indicator (red) flashes. You also hear voice guidance of the remaining battery charge.
B: 100% to 70% C: 70% to 50% D: 50% to 20% E: 20% or lower (needs to charge) 4-698-107-11(2) Copyright 2017 Sony Corporation 18
Help Guide Wireless Stereo Headset WI-C400 System requirements for battery charge using USB The headset contains a lithium ion rechargeable battery, which should be charged before using the headset for the first time. Personal Computer with pre-installed with any of the following operating systems and USB port: When using Windows® Windows® 10 Home / Windows® 10 Pro Windows® 8.1 / Windows® 8.
Help Guide Wireless Stereo Headset WI-C400 Turning on the headset 1 Press and hold the button for about 2 seconds until the indicator (blue) flashes.
Help Guide Wireless Stereo Headset WI-C400 Turning off the headset 1 Press and hold the button for about 2 seconds until the indicator (blue) turns off.
Help Guide Wireless Stereo Headset WI-C400 How to make a wireless connection to BLUETOOTH devices You can enjoy music and hands-free calling with the headset wirelessly by using your device’s BLUETOOTH function. Device registration (pairing) When using the BLUETOOTH function for the first time, you must previously register both devices to allow connection. The operation to register a device is called device registration (paring).
Help Guide Wireless Stereo Headset WI-C400 One-touch connection (NFC) with a smartphone (Android 4.1 or later) By touching the headset with a smartphone, the headset turns on automatically and then pairs and makes a BLUETOOTH connection. Compatible smartphones NFC-compatible smartphones installed with Android™ 4.1 or later NFC NFC (Near Field Communication) is a technology enabling short-range wireless communication between various devices, such as smartphones and IC tags.
To disconnect, touch the smartphone again. To connect a paired smartphone, perform step 4. Unlock the screen of the smartphone if it is locked. Hint If you cannot connect the headset, try the following. Unlock the screen of the smartphone if it is locked, and move the smartphone slowly over the N-Mark. If the smartphone is in a case, remove the case.
Help Guide Wireless Stereo Headset WI-C400 Disconnecting the smartphone by one touch (NFC) You can disconnect the headset from the connected smartphone by touching the headset with it. 1 Unlock the screen of the smartphone if it is locked. 2 Touch the headset with the smartphone. Touch the smartphone on the N-Mark of the headset. You hear voice guidance “BLUETOOTH disconnected”.
Help Guide Wireless Stereo Headset WI-C400 Switching the device by one touch (NFC) When the headset is connected with a BLUETOOTH device, if you touch an NFC-compatible smartphone on the headset, the headset is connected with the smartphone that touched on the headset most recently (One-touch connection switching). However, if you are talking on a BLUETOOTH mobile phone connected to the headset, you cannot switch the BLUETOOTH connection by one touch.
Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with an Android smartphone Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: The smartphone is placed within 1 m(3 feet) of the headset. The headset is charged sufficiently. The operating instructions of the smartphone is on hand.
4 Touch [WI-C400]. If passkey (*) input is required on the display of the smartphone, input “0000.” The headset and the smartphone are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, see “Connecting to a paired Android smartphone.” If [WI-C400] does not appear on the display, try again from step 3. * A Passkey may be called a “Passcode,” a “PIN code,” or a “Password.” Hint The above procedure is an example.
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Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired Android smartphone 1 Unlock the screen of the Android smartphone if it is locked. 2 Turn on the headset. Press and hold the button for about 2 seconds. Make sure that the indicator (blue) flashes after you release the button. You hear voice guidance “Power on”. After the headset turns on, if it has automatically connected to the last connected device, you hear voice guidance “BLUETOOTH connected”.
4 Touch [WI-C400]. You hear voice guidance “BLUETOOTH connected”. Hint The above procedure is an example. For details, refer to the operating instructions supplied with your smartphone. If the smartphone was connected with the headset the last time, an HFP/HSP connection is made when you turn on the headset. While the headset is on, you can make an A2DP connection (music playback) by pressing the button.
Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with an iPhone Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: The iPhone is placed within 1 m(3 feet) of the headset. The headset is charged sufficiently. The operating instructions of the iPhone is on hand.
3. Touch [ 4 ] to change it to [ ] (turn on the BLUETOOTH function). Touch [WI-C400]. If passkey (*) input is required on the display of the iPhone, input “0000.” The headset and the iPhone are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, see “Connecting to a paired iPhone.” If [WI-C400] does not appear on the display, try again from step 3. * A Passkey may be called a “Passcode,” a “PIN code,” or a “Password.
Listening to music from a device via BLUETOOTH connection Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation 34
Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired iPhone 1 Unlock the screen of the iPhone if it is locked. 2 Turn on the headset. Press and hold the button for about 2 seconds. Make sure that the indicator (blue) flashes after you release the button. You hear voice guidance “Power on”. After the headset turns on, if it has automatically connected to the last connected device, you hear voice guidance “BLUETOOTH connected”. Check the connection status on the iPhone.
4 Touch [WI-C400]. You hear voice guidance “BLUETOOTH connected”. Hint The above procedure is an example. For details, refer to the operating instructions supplied with your iPhone. If the iPhone was connected with the headset the last time, an HFP/HSP connection is made when you turn on the headset. While the headset is on, you can make an A2DP connection (music playback) by pressing the button.
Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with a computer (Windows 10) Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: Your computer has a BLUETOOTH function that supports music playback connections (A2DP). The computer is placed within 1 m(3 feet) of the headset.
3. Click the [Bluetooth] tab, then click the [Bluetooth] button to turn on the BLUETOOTH function. 4. Select [WI-C400], then click [Pair]. If passkey (*) input is required on the display of the computer, input “0000.
The headset and the computer are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, refer to “Connecting to a paired computer (Windows 10).” If [WI-C400] does not appear on the display, try again from step 3. * A Passkey may be called a “Passcode,” a “PIN code,” or a “Password.” Hint The above procedure is an example. For details, refer to the operating instructions supplied with your computer.
Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with a computer (Windows 8/Windows 8.1) Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: Your computer has a BLUETOOTH function that supports music playback connections (A2DP). The computer is placed within 1 m(3 feet) of the headset.
2. Select [Change PC settings] of the [Settings] charm. 3. Select [Devices] of [PC settings]. 4. Select [Add a device]. 5. Select [WI-C400]. If passkey (*) input is required on the display of the computer, input “0000.” The headset and the computer are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, see “Connecting to a paired computer (Windows 8/Windows 8.1).” If [WI-C400] does not appear on the display, try again from step 3.
Hint The above procedure is an example. For details, refer to the operating instructions supplied with your computer. To delete all pairing information, see “Initializing the headset to restore factory settings.” Note If pairing is not established within about 5 minutes, pairing mode will be canceled and the headset will turn off. In this case, start over from step 1.
Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with a computer (Windows 7) Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: Your computer has a BLUETOOTH function that supports music playback connections (A2DP). The computer is placed within 1 m(3 feet) of the headset.
3. Select [WI-C400], then click [Next]. If passkey (*) input is required on the display of the computer, input “0000.” The headset and the computer are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, see “Connecting to a paired computer (Windows 7).” If [WI-C400] does not appear on the display, try again from step 3. * A Passkey may be called a “Passcode,” a “PIN code,” or a “Password.” Hint The above procedure is an example.
Related Topic How to make a wireless connection to BLUETOOTH devices Connecting to a paired computer (Windows 7) Listening to music from a device via BLUETOOTH connection Disconnecting BLUETOOTH connection (after use) Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation 45
Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired computer (Windows 10) Before starting the operation, make sure the following: Depending on the computer, the built-in BLUETOOTH adaptor should be turned on. For whether or not a BLUETOOTH adaptor is incorporate, and for how to turn it on, refer to the operating instructions supplied with the computer. 1 Resume the computer from sleep mode. 2 Turn on the headset. Press and hold the button for about 2 seconds.
If [WI-C400] is not displayed, right-click on the [Sound] screen, then select [Show Disabled Devices]. 3. Click [Connect]. The connection is established.
The above procedure is an example. For details, refer to the operating instructions supplied with your computer. If the computer was connected with the headset the last time, an HFP/HSP connection is made when you turn on the headset. While the headset is on, you can make an A2DP connection (music playback) by pressing the button. Note If the sound quality for music playback is low, make sure that the function that supports music playback connections (A2DP) is available on your computer.
Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired computer (Windows 8/Windows 8.1) Before starting the operation, make sure the following: Depending on the computer, the built-in BLUETOOTH adaptor should be turned on. For whether or not a BLUETOOTH adaptor is incorporate, and for how to turn it on, refer to the operating instructions supplied with the computer. 1 Resume the computer from sleep mode. 2 Turn on the headset. Press and hold the button for about 2 seconds.
3. Select [Control Panel] in the [Settings] charm. 4. Select [Hardware and Sound], then [Devices and Printers]. 5. Right-click [WI-C400] in the [Devices and Printers] screen.
6. Select [Advanced Operation] — [Connect to audio sink device]. Hint The above procedure is an example. For details, refer to the operating instructions supplied with your computer. If the computer was connected with the headset the last time, an HFP/HSP connection is made when you turn on the headset. While the headset is on, you can make an A2DP connection (music playback) by pressing the button.
Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired computer (Windows 7) Before starting the operation, make sure the following: Depending on the computer, the built-in BLUETOOTH adaptor should be turned on. For whether or not a BLUETOOTH adaptor is incorporate, and for how to turn it on, refer to the operating instructions supplied with the computer. 1 Resume the computer from sleep mode. 2 Turn on the headset. Press and hold the button for about 2 seconds.
3. Click [Listen to Music]. Hint The above procedure is an example. For details, refer to the operating instructions supplied with your computer. If the computer was connected with the headset the last time, an HFP/HSP connection is made when you turn on the headset. While the headset is on, you can make an A2DP connection (music playback) by pressing the button.
Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with other BLUETOOTH devices Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: The BLUETOOTH device is placed within 1 m(3 feet) of the headset. The headset is charged sufficiently.
Hint The above procedure is an example. For details, refer to the operating instructions supplied with your BLUETOOTH device. To delete all pairing information, see “Initializing the headset to restore factory settings.” Note If pairing is not established within about 5 minutes, pairing mode will be canceled and the headset will turn off. In this case, start over from step 1.
Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired BLUETOOTH device 1 Turn on the headset. Press and hold the button for about 2 seconds. Make sure that the indicator (blue) flashes after you release the button. You hear voice guidance “Power on”. After the headset turns on, if it has automatically connected to the last connected device, you hear voice guidance “BLUETOOTH connected”. Check the connection status on the BLUETOOTH device. If not connected, proceed to step 2.
Related Topic How to make a wireless connection to BLUETOOTH devices Pairing and connecting with other BLUETOOTH devices Listening to music from a device via BLUETOOTH connection 4-698-107-11(2) Copyright 2017 Sony Corporation 58
Help Guide Wireless Stereo Headset WI-C400 Disconnecting BLUETOOTH connection (after use) 1 If using a device that supports one-touch connection (NFC), touch the device to the headset again. (Unlock the screen of the device if it is locked.) If using a device that does not support one-touch connection (NFC), operate from the BLUETOOTH device. When disconnected, you hear voice guidance “BLUETOOTH disconnected”. 2 Turn off the headset. You hear voice guidance “Power off”.
Help Guide Wireless Stereo Headset WI-C400 Listening to music from a device via BLUETOOTH connection You can enjoy listening to music and basic remote control operation of a BLUETOOTH device via a BLUETOOTH connection. The BLUETOOTH device is required to support the following BLUETOOTH profiles. A2DP (Advanced Audio Distribution Profile): enables you to enjoy high-quality audio content wirelessly. AVRCP (Audio Video Remote Control Profile): enables you to adjust volume, etc.
Note If the communication condition is poor, the BLUETOOTH device may react incorrectly to the operation on the headset.
Help Guide Wireless Stereo Headset WI-C400 Controlling the audio device (BLUETOOTH connection) If the BLUETOOTH device supports AVRCP, you can control it by the headset. The functions available may vary depending on the BLUETOOTH device. Refer to the operating instructions supplied with your BLUETOOTH device. Each button has the following function: Press once during pause to start playback. Press once during playback to pause. -( )/+( ) Press to adjust the volume.
Help Guide Wireless Stereo Headset WI-C400 Disconnecting BLUETOOTH connection (after use) 1 If using a device that supports one-touch connection (NFC), touch the device to the headset again. (Unlock the screen of the device if it is locked.) If using a device that does not support one-touch connection (NFC), operate from the BLUETOOTH device. When disconnected, you hear voice guidance “BLUETOOTH disconnected”. 2 Turn off the headset. You hear voice guidance “Power off”.
Help Guide Wireless Stereo Headset WI-C400 Supported codecs A codec is an audio coding algorithm used when transmitting sound via a BLUETOOTH connection. The headset supports the following 2 codecs for music playback via an A2DP connection: SBC and AAC. SBC This is an abbreviation for Subband Codec. This is the standard audio coding technology used by BLUETOOTH devices. All BLUETOOTH devices support SBC. AAC This is an abbreviation for Advanced Audio Coding.
Help Guide Wireless Stereo Headset WI-C400 Receiving a call You can enjoy a hands-free call with a smartphone or mobile phone that supports the BLUETOOTH profile HFP (Handsfree Profile) or HSP (Headset Profile), via a BLUETOOTH connection. If your smartphone or mobile phone supports both HFP and HSP, set it to HFP. Operations may vary depending on the smartphone or mobile phone. Refer to the operating instructions supplied with your smartphone or mobile phone.
Hint The default setting of the vibration function for receiving a call is “on.” To turn off the function, press and hold both the button and -/ button for about 2 seconds while the headset is on. You will hear a voice guidance which informs the switching of the function and the left unit of the headset vibrates twice briefly. To turn on the function again, press and hold both the button and +/ button for about 2 seconds while the headset is on.
Help Guide Wireless Stereo Headset WI-C400 Making a call You can enjoy a hands-free call with a smartphone or mobile phone that supports the BLUETOOTH profile HFP (Handsfree Profile) or HSP (Headset Profile), via a BLUETOOTH connection. If your smartphone or mobile phone supports both HFP and HSP, set it to HFP. Operations may vary depending on the smartphone or mobile phone. Refer to the operating instructions supplied with your smartphone or mobile phone.
Related Topic How to make a wireless connection to BLUETOOTH devices Receiving a call Functions for a phone call 4-698-107-11(2) Copyright 2017 Sony Corporation 68
Help Guide Wireless Stereo Headset WI-C400 Functions for a phone call The available functions may vary depending on the profile supported by your smartphone or mobile phone. Even if the profile is the same, functions may vary depending on the smartphone or mobile phone. Refer to the operating instructions supplied with your smartphone or mobile phone.
Help Guide Wireless Stereo Headset WI-C400 Disconnecting BLUETOOTH connection (after use) 1 If using a device that supports one-touch connection (NFC), touch the device to the headset again. (Unlock the screen of the device if it is locked.) If using a device that does not support one-touch connection (NFC), operate from the BLUETOOTH device. When disconnected, you hear voice guidance “BLUETOOTH disconnected”. 2 Turn off the headset. You hear voice guidance “Power off”.
Help Guide Wireless Stereo Headset WI-C400 Using the voice assist function (Google App) By using the Google App feature that comes with the Android smartphone, you can speak to the headset’s microphone to operate the Android smartphone. 1 Turn the Google App on. On the Android smartphone, select [Settings] — [Apps]. A gear icon appears in the top-right corner of the display. Select the gear icon, then [Default Apps] — [Assist & Voice input] — [Assist App], and then set [Assist App] to the Google App.
Help Guide Wireless Stereo Headset WI-C400 Using the voice assist function (Siri) By using the Siri feature that comes with iPhone, you can speak to the headset’s microphone to operate the iPhone. 1 Turn Siri on. On iPhone, select [Settings] — [Siri] to turn Siri on. The operation above is an example. For details, refer to the operating instructions of the iPhone. Note: For details on Siri, refer to the operating instructions or support website of the iPhone.
Help Guide Wireless Stereo Headset WI-C400 Precautions On BLUETOOTH communications BLUETOOTH wireless technology operates within a range of about 10 m (30 feet). Maximum communication range may vary depending on obstacles (human body, metal, wall, etc.) or electromagnetic environment. Microwaves emitting from a BLUETOOTH device may affect the operation of electronic medical devices.
If you experience discomfort after using the BLUETOOTH device, stop using the BLUETOOTH device immediately. Should any problem persist, consult your nearest Sony dealer. Install the earbuds firmly. If an earbud accidentally detaches and is left in your ear, it may cause injury. Since children may swallow small parts such as an earbud, keep the headset out of reach of children.
Help Guide Wireless Stereo Headset WI-C400 Trademarks The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Sony Corporation is under license. The N-Mark is a trademark or registered trademark of NFC Forum, Inc. in the United States and in other countries. Android and Google Play are trademarks of Google Inc. Windows is a registered trademark or trademark of Microsoft Corporation in the United States and/or other countries.
Help Guide Wireless Stereo Headset WI-C400 Customer support websites Please access the following support website to get the support information about your headset: For customers in the U.S.A: http://esupport.sony.com/ For customers in Canada: http://esupport.sony.com/CA/ For customers in Latin America: http://esupport.sony.com/LA/ For customers in European countries: www.sony.eu/support For customers in China: https://service.sony.com.cn/ For customers in other countries/regions: http://www.sony-asia.
Help Guide Wireless Stereo Headset WI-C400 What can I do to solve a problem? If the headset does not function as expected, try the following steps to resolve the issue. Find the symptoms of the issue in this Help Guide, and try any corrective actions listed. Connect the headset to a computer to charge the battery or reset. You may be able to resolve some issues by charging the battery.The headset is reset automatically when the charging starts. Initialize the headset.
Help Guide Wireless Stereo Headset WI-C400 The headset is not turned on. Charge the battery of the headset. The headset cannot be turned on while charging the battery. Remove the micro-USB cable from the headset, and then turn on the headset again.
Help Guide Wireless Stereo Headset WI-C400 Charging cannot be done. Check that you are using the micro-USB cable supplied. Check that the micro-USB cable is connected to the headset and the computer firmly. Check that the computer is turned on. Check that the computer is not in standby, sleep or hibernation mode. When using Windows 8.1, update using Windows Update.
Help Guide Wireless Stereo Headset WI-C400 Charging time is too long. Check that the headset and the computer are directly connected, not via a USB hub.
Help Guide Wireless Stereo Headset WI-C400 The remaining battery charge of the headset is not displayed on the screen of an iPhone or iPod touch. The remaining battery charge is shown only on the screen of an iPhone or iPod touch (iOS 5.0 or later) that supports HFP (Hands-free Profile). Make sure that the iPhone or iPod touch is connected with HFP (Hands-free Profile). Otherwise, the remaining battery charge will not be displayed correctly.
Help Guide Wireless Stereo Headset WI-C400 No sound Check that both the headset and the connected device (i.e., smartphone) are turned on. An A2DP BLUETOOTH connection is not made between the headset and the BLUETOOTH device. Use the BLUETOOTH device and make an A2DP BLUETOOTH connection. Turn up the volume of the headset and the connected device (i.e., smartphone). Check that the connected device is playing back.
Help Guide Wireless Stereo Headset WI-C400 Low sound level Turn up the volume of the headset and the connected device.
Help Guide Wireless Stereo Headset WI-C400 Low sound quality Turn down the volume of the connected device. Keep the headset away from a microwave oven, Wi-Fi device, etc. Bring the headset and the BLUETOOTH device closer together. Remove any obstacles between the headset and the BLUETOOTH device. Keep the headset away from a TV. Switch the BLUETOOTH connection to A2DP by operating the BLUETOOTH device when HFP or HSP is set.
Help Guide Wireless Stereo Headset WI-C400 Sound skips frequently during playback. Remove any obstacles between the antenna of the BLUETOOTH device to be connected and the built-in antenna of the headset. The antenna of the headset is built into the part shown in the dotted line below. A: Location of the built-in antenna BLUETOOTH communications may be disabled, or noise or audio dropout may occur under the following conditions. There is a human body between the headset and the BLUETOOTH device.
Help Guide Wireless Stereo Headset WI-C400 Pairing cannot be done. Bring the headset and the BLUETOOTH device within 1 m(3 feet) from each other. When you turn on the headset for the first time after purchasing, initializing, or repairing it, the headset enters pairing mode automatically. Pair the headset with a BLUETOOTH device. When you want to pair a 2nd or subsequent device, press and hold the button of the headset for more than 7 seconds to enter pairing mode.
Help Guide Wireless Stereo Headset WI-C400 Unable to connect the headset to a BLUETOOTH device with one-touch connection (NFC) Keep the smartphone close to the headset until the smartphone reacts. If you fail to connect, move the smartphone slowly on the N-Mark of the headset. Check that the NFC function of the smartphone is set to on. If the smartphone is in a case, remove it. NFC reception sensitivity varies depending on the device.
Help Guide Wireless Stereo Headset WI-C400 Unable to make a BLUETOOTH connection Check that the headset is turned on. Check that the BLUETOOTH device is turned on and the BLUETOOTH function is on. If the headset automatically connects to the last connected BLUETOOTH device, you may fail to connect the headset to other devices via the BLUETOOTH function. In that case, operate the last connected BLUETOOTH device and disconnect the BLUETOOTH connection. The BLUETOOTH device is in sleep mode.
Help Guide Wireless Stereo Headset WI-C400 Distorted sound Keep the headset away from a microwave oven, Wi-Fi device, etc.
Help Guide Wireless Stereo Headset WI-C400 The BLUETOOTH wireless communication range is short, or the sound skips. Remove any obstacles between the antenna of the BLUETOOTH device to be connected and the built-in antenna of the headset. The antenna of the headset is built into the part shown in the dotted line below. A: Location of the built-in antenna BLUETOOTH communications may be disabled, or noise or audio dropout may occur under the following conditions.
Help Guide Wireless Stereo Headset WI-C400 The headset does not operate properly. Reset the headset. Pairing information is not deleted by this operation. If you cannot use the headset even after resetting it, initialize the headset.
Help Guide Wireless Stereo Headset WI-C400 No voice from callers Check that both the headset and the connected device (i.e., smartphone) are turned on. Turn up the volume of the headset and the connected device (i.e., smartphone). Check that output of the BLUETOOTH device is set for the headset. Select an HFP or HSP BLUETOOTH connection by operating the BLUETOOTH device. If you are listening to music using the headset, stop playback, press the button on the headset and talk.
Help Guide Wireless Stereo Headset WI-C400 Low voice from callers Turn up the volume of the headset and the connected device.
Help Guide Wireless Stereo Headset WI-C400 Resetting the headset If the headset cannot be turned on, or if it cannot be operated even when it is turned on, reset the headset. The headset is reset automatically when the charging starts. Pairing information and other settings are not deleted by this operation. If the headset does not operate correctly even after resetting, initialize the headset to restore factory settings.
Help Guide Wireless Stereo Headset WI-C400 Initializing the headset to restore factory settings Disconnect the micro-USB cable, turn off the headset, then press and hold the button and button simultaneously for more than 7 seconds. The indicator (blue) flashes 4 times ( ), and the settings such as the volume adjustment are reset to the factory settings. All pairing information is deleted.
