The basic operations of 4GS (BTHS-4GS)

MFB button

Power on

Press and hold the MFB for 3 seconds until blue LED flashes 3 times

Power off

Press and hold the MFB for 3 seconds until red LED flashes twice

Answer a call

Press MFB once

End a call

Press MFB once

Reject a call

Press and hold MFB for 3 seconds

Re-dialing

Double click MFB

Voice dial / Voice command

(phone feature)

Press MFB once

Get into pairing mode

Press and hold MFB until the LED blinks alternatively RED and BLUE.

+ button

Volume up

Press + button once

- button

Volume down

Press - button once

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