Universal external battery for various digital products as iPhone/iPod/ Mobile Phone/ MP3/ MP4/PSP Product features: ... demand of various communicate and digital devices like mobile, ipad,iphone,ipod,MP3,MP4,PSP,Digital camera ... LED light function and power indicator.with 7 adaptors for use of iphone,nokia, samsuna, sony ericsson, ... supply/Universal external battery 4200 mAh for mobile digital products