Actually, the ReadyCase for iPhone 5/5s can do more than that. It can protect your phone, as you’d expect, but it also incorporates a multi-function tool that has a can opener, screwdriver, and regular and serrated blades. There’s also a your choice of a 4GB or 8GB flash drive that stores data and serves as a stand for horizontal or landscape viewing. It also incorporates a headphones clip and has a lens-mounting ring that allows you to attach a macro, wide-angle, or fisheye lens (optional purchase). The case adds only 3mm of thickness to the iPhone. The iPhone 5/5s ReadyCase with a 4GB flash drive is $45 and is $55 with the 8GB drive; also get the optional lens kit with either version of the case for an additional $20. It’s available at the ReadyCase website.
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