Alpine CDA-9883 CD/MP3/WMA/AAC Receiver Built-in amplifier (18 watts RMS/50 peak x 4 channels) Plays CDs, CD-Rs, and CD-RW discs, including discs loaded with MP3, WMA, and AAC music files (except Digital Rights-protected files) Fold-down, detachable face Optional remote control Full Speed iPod controls (requires Alpine's interface cable - sold separately)