QCC3031 supports SBC, AAC, APTX, APTXLL, APTXHD
With call function, low power consumption, power on, the default volume is maximum, support TWS pairing.
3.6-5.5V power supply (compatible with lithium battery power supply or 5V power supply)
VCC and GND are the power supply pins, L, G, R are connected to earphones
M+ and M- are the positive and negative of the microphone

COM is the common end of the button, the other end of the button is connected to VOL+, VOL-, PREV, NEXT, PLY
Key Description:
"VOL+": Short press to increase the volume, long press to increase the volume
"VOL-": Short press to decrease the volume, long press to decrease the volume continuously
"NEXT": short press a song
"PREV": Short press the previous song
"PLY": Short press to play/pause/answer/hang up, long press for 1 second to reject the call
Special function description:
"PLY": Long press for 3 seconds to force enter pairing mode, long press for 6 seconds to clear the pairing list
"PLY" + "VOL+": Press and hold for 1 second to enter the search TWS mode
"PLY" + "VOL-": Press and hold for 1 second at the same time to enter the searched TWS mode
"VOL+" + "VOL-": Press and hold for 1 second to disconnect TWS
Power amplifier board size: 5.7 x 3.3CM
Colour: Red
Material: plastic

Package Contents:
1 x Power Amplifier Module
Note: There is no manual, please confirm the knowledge of circuit board connection before placing an order.
Electronic components may be upgraded, and some accessories may be slightly different from the pictures.

Only the above package content, other products are not included.
Note: different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.