SallyBest&reg; 12V USB SD DVD FM Car Motorcycle Stereo Radio MP3 Player Auto Car Mini HiFi Digital Power Amplifier with Remote Control It can play U disk SD / MMC card for music and FM car motorcycle stereo radio, support MP3 music format. Two main channel output. Filtering and anti-large-capacity power circuit. Selected high-power four-channel professional power amplifier integrated circuits, minimal distortion strong power. Pre-professional level input operational amplifier IC for circuit design, sound, transparent, bright. DSP sound field pattern of the four. It supports FM radio play (FM: 87.5 ~ 108MHz).