... :have CE,FCC,ROHS approved Portable Charger Battery for iPhone 4S/4/3G/3GS ,Mobile phone(Such as Blackberry,Nokia,Samsung Motorola ,Lg ... . 3:USB power out for charging any device that powers from a USB socket such as iPod , iPhone ,Cell phone and MP3 player . 4 ... On /Off button to save battery when not in use . Compatible with: iphone 4,iPhone 3G/3GS, ,Cell phone , and MP3 with USB ...