Size of power amplifier board: 2.9x2.9CM

It can connect 2 mobile phones at the same time (the only way: start the automatic chain back, the last pair of mobile phones, reciprocal second pairs of mobile phones need to manually connect)

With call function, CSR8645 low power, power on, the default volume is the maximum.

5V power supply, maximum power drive double 4 euro 3W

6.5V power supply, maximum power drive double 4 euro 5W

VCC and GND are power supply pins, LN (-) and LP (+) are connected to the left horn, and RN (-) and RP (+) are connected to the right horn

COM is the common end of the button, and the other end of the button is connected with VOL+, VOL-, PREV, NEXT and PLY respectively

M+ and M- are the positive and negative of the head of the receiver