Bluetooth Cassette How It Works HD

step by step tutorial: https://www.youtube.com/watch?v=6DN6p9UObL4 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