The adidas miCoach Armband from Griffin Technology is a workout band worn designed especially for the miCoach training regimen and fits the Original iPhone, 3G/GS, 4/S and Original iPod touch, 2nd, 3rd, 4th Generation. It's worn around your bicep and held in place by a buckle. The nylon material helps wick moisture while you're exercising. The unit features a moisture-resistant touch-through screen protector. There are ports that accept your headphone or headset For added convenience, there is a built-in key holder.