The sports armband case is specifically designed for iPhone 4. It provides complete protection for your iPhone. Via the armband case， you can enjoy music and never will miss a call while jogging， running， exercising， or working out. There is an exposed earpiece design allows you answer calls without taking the phone out. The adjustable Velcro strap lets you adjust your arm band for maximum comfort. It also fits other cellphones of similar size. The sports armband case is perfect to carry and protect your iPhone 4 as you are doing sports or working out.