HBetterTechTMPremium USB 2.0 Type A Male to 30-pin Dock Extension Spring Retractable Cable for iPhone 4/4s iPad 2/3 (Black) Charge your device using the computer's USB port 100% Brand new and high quality Coiled cable design saves space and discourages tangles Cable constructed using the high quality material for best contact connection Compatible with all mobile devices for data sync and charging