Basic BLUETOOTH MP3 Amplifier Kit. It is finally here! Now you can add speakers and an amplifier to your cart to play music from you phone or MP3 player and… you do not have to run a wire from your phone or MP3 player to the cart. With this system’s Bluetooth receiver, simply sync your Bluetooth capable phone or MP3 player to the amplifier (basically just enter security code “0000” when prompted by your phone or MP3 player) and you are up and running!!!