... USB and SD card 2.support mp3,wma 12V Car/Motoryclce/motor bike/scooter audio amplifier with FM radio,support USD,SD ... card can be playedThis product is suitable for power supply 12V electric cars, motorcycles, beach vehicles, cars, trucks, tricycles, etc.Welcome ... . wire control working style is as below drawing: 12V Car/Motoryclce/motor bike/scooter audio amplifier with FM radio,support USD,SD ...