This is a Audio car kit. It is a replacement of CD changer. It can be easily installed and used. The installation and usage are the same as CD changer"s installation and usage, Simply plug in USB disk/SD card, you can play audio through car audio system and enjoy music in your car. Features: 1. Plug&play, CDC alternative 2. Connected with wire harness, not FM signal controlled ,Hi-Fi guaranteed 3. Controlled by vehicle Head Unit, support Steering wheel operation 4. With imported Hi-Fi Decoding Chip, perfectly support MP3 and WMA tracks 5. Supports SD/SDHC/MMC card/U Disk/Card Reader/Hard Disk 6. Supports external audio source(MP3 MP4 PSP Mobile Phone) via AUX in port 7. Playlist function same as multi CDs 8. Supports Last Position Memory (LPM) 9. Vibration and interference proof 10. Easy to install, no damage to original car decorations for different car models or car radios Compatible List Honda: Accord 2003-2011, Civic 2006-2010, CRV 2004-2011, Element 2003-2011, Odyssey 2005-2010, Pilot 2005-2011, Fit 2006-2011 , S2000 2005-2010 Acura: CSX 2006-2011, MDX 2005-2006, RDX 2007-2011, TSX 2004-2011(except type S) IMPORTANT: 1.Fits following head units: Accord Navi Radio, Accord Premium 6CD Radio, Accord single CD radio, Accord 6 CD Radio,Civic 1,Civic Navi Radio,Odyssey Civic 1,1sc0,1yc5,2hu2,2j30,2j32,2j34,2jl0,2jb0,2ka0, 2mb0,2p30,2p32,2p34,2pl4,2tw0,3sa0,3ts0,3yc0,3yn0,4mf1,4xb0,4yl3,7bk0,CM926R0 2.Compatible with Honda Navigation System.