Lightning Promotion:ONLY $16.99 to get OPSO 5200mAh External Battery Pack(by ASIN: B009NBSLPS) by clicking "Add Both To Cart " on the top of the PRODUCT PROMOTION when you purchase every OPSO 4 Feet 30pin Dock cable Specification: 1. Color: White 2. Interface: USB 2.0 A type to Dock 3. Connectors: USB A(male) to Dock(male) 4. Length: 1.2m 5. Weight: 23g Compatible for: 1. iPod touch(1st,2nd,3rd, and 4th generation) 2. iPod nano(6th generation) 3. iPhone 4S, iPhone 4, iPhone 3GS, iPhone 3G 4. iPad(1st,2nd,3rd generation) This is the iLinker sync charger dock USB cable for iPhone 4/iPhone 4S/iPad 2/ iPad 3/iPod touch/iPod nano which manufactured by OPSO and authorized by Apple Inc. With high standard USB 2.0 transfer rate and stable performance, this cable is highly recommended by our customers and Apple Inc.