This product is a power amplifier with a digital amplifier IC “PAM8008”, and can be used to listen to the music from a portable audio player and so on by speakers. It can also be installed in a self-made audio system. As the sound volume knob is already mounted, you just need to prepare the power source and ready to use it.
The PCB fits in a plastic case of mint tablets commercially available worldwide. *(It requires modification to the case.)