Bluetooth Cassette How It Works

please check my latest video for the latest bluetooth cassette design. step by step tutorial: bluetooth 4.2 Monster head type c battery charger microphone automatically turns on when inserted and off when ejected batteries on parallel mode to keep the same voltage sound quality is equivalent to cd player! this is my first version, I have since added a micro switch for the on/off function honda civic vx 92-95 diy bluetooth cassette adapter