12v motorcycle audio amplifier with alarm function 1.supports USB and Micr SD card, 2.Far ... SD memory card and portable USB2. FM radio function.3. Wireless remote control with alarm function4. Over-voltage, over-current pretection5 ... 12V electric cars, motorcycles, beach vehicles, cars, trucks, tricycles, etc.Welcome to contact us for more information. 12V Motorcycle Audio amplifier with alarm function ...