Review on 🎧 SUBALIGU 3pcs M28 Wireless Bluetooth MP3 Audio Receiver Board BLT 4.2 Lossless Decoder Stereo Sound Module by Jackie Harbour

I'll be stupid. They work very well. They have a built in charger so you can plug in a 3.7 inch battery and use your micro USB to power or charge the battery on the go. The sound is great and it's easy to pair. There are no volume buttons, but the car radio and MP3 player (mobile phone) have volume controls. That's the problem. I 3D printed a neat little box, leaving only room for a 3.5mm headphone jack and some room at the bottom for a small lipo battery. When I first plugged it in, everything worked PERFECTLY. THEN it went into "SLEEP MODE" after complete assembly. I had to restart the device without unplugging the battery which was not soldered to the board. ! A simple two solder point soldering for a small RESET button or ON/OFF switch would have made this a 5/5 star rating. It's really a shame! Even simply unplugging the USB connector doesn't help if you also have it on battery power. :(