Review on UWAYKEY Bluetooth Mini Amplifier Board Class D - DIY Wireless Speaker Module by Cheryl Wilson

Coin sized amplifier board, great sound, great bluetooth. For power, I use a 3.7V lithium battery and connect two 2 inch speakers to it. I don't think you can guess where I bought the speaker box. It's basically a hamster house and the size of the hole is exactly the size of my speaker. It should be noted that if you need to connect a battery, you need to know how many volts your battery has. The connection place of 5V battery and 3.6-4.2V battery is different, this amplifier and the manual are marked, you need to pay attention when installing. At the same time, when connecting the battery, it is necessary to use a battery with a protection circuit. At the same time, I added a gradient light to this Bluetooth speaker, which should actually be a breathing light function. I will upload my other short video about the production process.