Seidio BD4-HKR4IPH4X-BK CONVERT Plus Case and Holster Combo for Apple iPhone 4/4S - Retail Packaging - Black First iPhone 4/4S power case with a removable battery that is certified by Apple Ultimate Screen Guard protects your screen without the use of messy adhesives Sleek case includes a 1700mAh battery in a slot inside the case that allows users to swap out battery with a spare; can be used alone Rugged Skin and Skeleton fit over the Surface case for added protection and ports and camera are protected but functional CONVERT Holster locks, swivels and fits up to a 2'' duty or utility belt