Operating Instruction

Operating instruction of SD251-BT/BT251-BK

I. Functions of keys

Power On: Press center key for 3 seconds

Power Off: Press center key for 3 seconds

Volume Up: Short press "+" key

Volume Down: Short press "-" key

Next Track: Long press "+" key.

Previous Track: Long press "-" key

Play the Track: Press "center" key once

Pause the Track: Press "center" key once

Answer incoming call: Press "center" key once

Refuse incoming call: Press "center" key twice

End the call: Press "center" key once

Last number Redial: Press "center" key twice

Activate Siri: Press "center" key thrice

MIC: Microphone

USB: micro USB charging port

II. Charging

The Bluetooth headset has a built-in rechargeable battery and the battery power of a new headset is not

enough; please charge for at least 1.5 hours to make the battery power enough before the first use. Hereafter,

charging will take about 1 hour. While it is charging, the red light is on; while the charging is saturated, the red

light will be off .

III. Pairing of headset and Bluetooth device

The Bluetooth headset must be paired with your mobile phone (or other Bluetooth devices) before use.

1. When the headset is in power-off state, please press center key to power on, will hear the voice prompt

“power on “ and ”pairing”.

2. Search the Bluetooth device on your Bluetooth headset (please refer to the mobile phone instructions for

detailed process). When the search is finished, you will find a new device called "SD251-BT" in the device list.

3. Select SD251-BT which will be automatically paired and connected with mobile phone; when the pairing

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Operating instruction of SD251-BT/BT251-BK I. Functions of keys Power On: Press center key for 3 seconds Power Off: Press center key for 3 seconds Volume Up: Short press "+" key Volume Down: Short press "-" key Next Track: Long press "+" key.
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connection is successful, will hear the voice prompt “connected “ Notes: In the process of pairing, some mobile phone requires inputting pairing password, please input "0000"; The headset will automatically shut down if it cannot find the paired device in 3-5 minutes; If the Bluetooth headset is not in the pairing state, your mobile phone or other Bluetooth devices will not be able to search to the headset, please set the headset to the pairing state and then use the mobile phone to search again. IV.
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VIII．Packing list : 1.SD251-BT Earphone headset 1pcs 2.USB charge cable 1pcs 3.Proudct user manual 1pcs Product specification and parameters: Product name Bluetooth stereo earphone SD251-BT/BT251-BK Product model Version Bluetooth V5.0 (QCC3005) Frequency range 2.402GHZ~2.
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Danger of explosion if battery is incorrectly replaced Replace only with the same or equivalent type. FCC Statement This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.