It depends on what's coming with it. If it's literally nothing except a flat feel to it, it'll be for 3GS through 5, iPod Touch 4th and 5th, and the iPad 2 through Mini. If it's offering something huge, most likely the 4S, 5, iPod Touch 4th/5th gen, and iPad 2-Mini. Basically the only differences would be the 3GS and the 4 because of hardware restrictions