Fix Broken Bluetooth/Speaker Set for Electric Scooter Hoverboards 12V 36V Bluetooth Card and Loud Speaker Set - compatible with 12-36V input. If you are looking to add Bluetooth to a unit that did not come with Bluetooth, soldering is required. Replaces, repairs, fixes a balance scooter with a broken Bluetooth with hardwire connection into the motherboard Compatible with most units and motherboards. This bluetooth board will not burn out if the power polarity is reversed. Comes with Bluetooth Board, Power Connection Wire and Resonant Speaker *** It it highly recommended you disconnect the battery before beginning and take several photos of the everything before you begin. DO NOT MIX UP THE SPEAKER AND POWER CONNECTIONS. THIS WILL BURN UP THE BLUETOOTH AND SHORT OUT YOUR MOTHERBOARD.