Heat Sensitive iPhone 4 Backing
The heat sensitive iPhone backing's colors range from black, all the way through red, yellow, and green before arriving at a deep blue.
Please Note: In colder climates, it is normal for this backing to respond slowly to changes in temperature - especially since one's hands tend to be cooler than usual. If the phone is left at a cool resting temperature, allow some time for the phone to reach a temperature close to that of your body. This product performs best indoors. The Backing is available with or without the Apple Logo Cut-Out. Simply make your choice when making your purchase.