... ,sd card slot FM radio, mp3 player, amplifier DC 12V, AC 220V subwoofer car amplifier mp3 / fm radio subwoofer Item No.: GSG ... file: MP3 formatwaterproof operating panelWireless remote controlBuilt in two pcs 4 inches speaker ( Loudspeaker / Tweeter )Carpat / PVC / Artificial leather ... DC 12 V: motorcycle / motor-tricycle / beach vihicle / truck / car and so on Supply power with AC 220V : home audio ...