12v usb/sd audio amplifier for car Usb,sd card slot FM radio, mp3 player, amplifier DC 12V, AC 220V 12v usb/sd ... audio amplifier for car Item No.: GSG-DY01Technique ... )Carpat / PVC / Artificial leather surface for optionalEQ effect: Flat / Jazz / Class / Pop / Rock Surface color choice: Red, Black, Green, Blue,Yellow ...