DIY Bluetooth 5.0 Audio Receiver Module PRO MP3 Bluetooth Decoder Board Car Speaker Audio Amplifier Board 4.1

1. Long-range transmission, Bluetooth 5.0 backward compatible, lossless sound quality
2. BT5.0 Audio PRO continues the excellent basic functions of BT5.0 Audio
3. Add more humanized performance, easy to use
4. Size: about 3.8 x 3.6cm
5. Note: delivery of only the module, does not contain other

Instructions for buttons:
1. ON/OFF: Bluetooth power on/off
2. BACK/V: previous song/volume down
3. NEXT/V+: next song/volume up
4. PLAY/STOP: play/pause, answer/hang up
5. Micro USB power supply
6. Lithium battery power supply (please do not reverse)
7. 3.5mm headphone jack
8. Microphone
9. MUTE output
10. Charging status indicator (red)
11. Battery indicator (yellow)
12. Bluetooth indicator (blue)