1.for iphone battery 2.battery for iphone Bracket Stand function 3.for iphone battery Protective IC circuit 4.Battery:Li-ion The thinnest for iPhone 4 Power Pack in the world! Feathers: 1.Strong durable engineering material 2.Doubles stand-by time of iPhone 4 3.Cut outs for all the iPhone 4's features 4.Protective IC ciruit 5.Bracket Stand function 6.Slim fitting design adds no extra bulk - fits perfectly in your pocket Specification: Capacity:1400mAh Battery:Lithium-ion input:5.0V-500mA Output-5.0V-500mA Diension:123.8 x 60.8 x 15mm Weight:Approx: 53.5g