The world"s thinnest rechargeable battery case for iPhone 3G & iPhone 3G S. Tthe brand new mophie "juice pack airTM" is designed to virtually double the time you have to Rock, Talk, Surf and Send with your iPhone 3G or 3G S. The juice pack airTM is a rechargeable external battery concealed inside of a protective form-fitting case for the iPhone 3G & iPhone 3G S. It offers you the full protection of a hard-shell case while providing virtually twice the battery life of the iPhone alone; all in an ultra-thin, light-weight, low-profile design. The juice pack airTM is available exclusively through mophie.com and Apple stores world-wide. This is the first Apple certified "Works With iPhone 3G" attached battery in the world! The juice pack airTM is specially designed for iPhone 3G & 3G S and has passed the strict over-the-air performance tests by an Apple designated test lab. As a result, the mophie juice pack airTM has been officially certified by Apple Inc. as a "Works with iPhone 3G" product! The mophie juice pack airTM for iPhone 3G & 3G S, also uses Apple designated connector, which can only be ordered through Apple"s certified vendors. This ensures it"s 100% compatible with your iPhone 3G or 3G S. Hardshell case is Black