4Gs 3G 3Gs iPhone 4G Dock / Dock with Line Out, It can adapt docker included iphone case (Electronics)
Although by the price and the audio plug out, but for iPhone 4 / 4S, use with a shell is not possible, the size of the base is just for the iPhone. The photo of the ad is not entirely accurate, it's not exactly dock there, mine is smaller is done exa