Instruction manual CX 400BT True Wireless
Table Of Contents
- Important safety instructions
- Package contents
- Product overview
- Getting started
- Using the earphones
- Information on the rechargeable battery, the charging process and the first use
- Charging the rechargeable battery of the earbuds and the charging case
- Connecting the earphones to a Bluetooth device
- Information on the Bluetooth wireless connection
- Pairing the earphones with a Bluetooth device
- Switching the connection to paired Bluetooth devices/“Connections”
- Disconnecting the earphones from a Bluetooth device
- Pairing the earbuds with each other (optional)
- Installing the Smart Control app
- Selecting suitable ear adapters for optimum fit of the earbuds
- Inserting the earbuds into the ears
- Switching the earphones on
- Switching the earphones off
- Adjusting the volume
- Using the voice assistant/voice dialing
- Controlling music playback
- Making calls using the earphones
- Using the Auto Call function
- Displaying the battery charge status
- Adjusting sound effects/the equalizer
- Setting the voice prompts/beep sounds
- Customizing the control functions
- Storing or transporting the earphones in the charging case
- Care and maintenance of the earbuds/charging case
- FAQ/If a problem occurs ...
- Specifications
- Manufacturer Declarations
Important safety instructions
CX 400BT True Wireless | 3
Notes on data collection and processing and on firmware updates
This product stores individual settings such as the volume, the
sound profiles and the Bluetooth connection data of paired devices.
This data is required for the operation of the product and is not trans
-
ferred to Sennheiser or companies commissioned by Sennheiser and
is not processed.
Using the “Sennheiser Smart Control” app, you can update the firm-
ware of the product for free via an Internet connection. If the device
on which the app is installed is connected to the Internet, the follow
-
ing data is automatically transferred to and processed by Sennheiser
servers in order to provide and transfer suitable firmware updates:
hardware identifier, hardware revision number, firmware version of
the product, operating system type (Android, iOS) and version, ver
-
sion of the app. The data will only be used as specified and will not
be stored permanently.
If you do not want this data to be transferred and processed, do not
connect to the Internet.
Intended use/Liability
These headphones have been designed as an accessory for Blue-
tooth compliant devices. They are intended for wireless audio com-
munication such as music playback and phone calls via Bluetooth
wireless technology.
It is considered improper use when the product is used for any appli-
cation not named in the corresponding product documentation.
Sennheiser does not accept liability for damage arising from misuse
or improper use of this product and its attachments/accessories.
Sennheiser is not liable for damages to USB devices that are not con-
sistent with the USB specifications. Sennheiser is not liable for dam-
ages resulting from the loss of connection due to flat or overaged
rechargeable batteries or exceeding the Bluetooth transmission
range.
Before putting into operation, please observe the respective coun-
try-specific regulations.
Only use rechargeable batteries and chargers
recommended by Sennheiser.
Only charge the product / rechargeable batteries at
ambient temperatures between 10 °C to 40 °C/50 °F to
104 °F.
Do not heat the product / rechargeable batteries above
70 °C/140
°F. Avoid exposure to sunlight and do not
throw the product / rechargeable batteries into fire.
When not using the product / rechargeable batteries for
extended periods of time, charge them regularly (about
every three months).
Switch rechargeable battery-powered products off after
use.
Dispose of defective products with built-in rechargeable
batteries at special collection points or return them to
your specialist dealer.