Upload entire CD collection, build playlists, and customize music. Listen to MP3s and WMA files in your car. Package contents: Surface mount controller, 20G hard disk drive, HD drive housing, 6.56 ft. mini USB cabble, 9.84 ft cable, 16.4 DIN cable, RCA audio cable, Wiring Module, AC adapter, SimpleCenter Software CD, Mounting hardware. RCA or FM modulator connection to source unit Optional D Link wireless USB adaper (DWL-121) Removable disk drive cartridge (20Gb) with drop protection The Mobile 20GB Digital Media Player let's you bring your media with you anywhere, anytime. The media player will play CD-quality MP3/WMA files and gives you access of up to 300 hours of music, even in your car. Or, transfer your files from your PC to the 20GB hard drive via a USB 2.0 cable or optional wireless adapter (sold separately), and have access to it whenever you want. Car stereo operation requires AUX inputs or FM modulator. System requirements: Windows 98SE and up. Imported. Controller with mounting brackets: 1-3/4Hx1-3/4Wx6-1/2L".