This motorcycle audio amplifier supports USB and SD card. remote control FM radio function Motorcycle Audio amplifierOutlook size:B9052F:15cm*20cm; B9053F:15cm* ... extension cable operating panelMemory,over-voltage over-current protection,stereo amplifier big-power three trackEQ effect: Flat/Jazz/Rock/POP/ ... vehicles, cars, trucks, tricycles, etc.Welcome calls to negotiate Motorcycle Audio amplifier