niceeshop(TM) Black Auxiliary Retractable 3.5MM Jack Male to Male Audio Cable Cord for MP3 iPod iPhone Phones Car Stereos Length:12.7cm(can be extended up to 32.5 inches/0.8m) Retractable design cuts down on travel bulk&ensures the portability of your MP3 player w/ out sacrificing functionality Plug one end of the cable to your earphone jack of your MP3 player and the other end to AUX input jack in your vehicle Compatible with:Any Cell phone / Mp3 Players / PDA with standard 3.5mm jack / Apple iPhone 4 16GB / 32GB