... Power indication light 5.USB plug mini backup power for mobile phone,mp3 player model YSF-MSP108Specifications1.With built-in Li-ion battery ... 3.Power indication light available.4.Magnetic catch, especially good for ipad2 magnetic case.5.Can charge iPhone series, also ... size, and little weight. And it is also good andconvenient for traveling, climbing, fishing, camping and long-drive.Main Components 1 ...