Generic 315265 3.5mm Auxiliary Retractable Audio Cable Cord for iPhone 3G/3GS, iPod, Black Technical Details Retractable 3.5mm M/M Audio Extension Cable For iPhone 3G 3GS/iPod & Other Cell phone and MP3 Players ! Compatible with: Any Cell phone / Mp3 Players / PDA with standard 3.5mm jack! The innovative retractable design cuts down on travel bulk & ensures the portability of your MP3 player w/ out sacrificing functionality. Good Quality