The ClickMate is a set of cases and adapters that click together, like Lego pieces, to build the right case for the occasion. It all starts with what NUU calls the Foundation case. The Foundation is a minimalistic shell, in smoky black or white, that can serve as a basic case. But what sets it apart is a special lip at the bottom and a slot at the top. Different case attachments then snap on as your needs dictate. There is a rotating belt clip attachment called the ClickMate Clip. Unlike some holster solutions, the belt clip and case remain attached to the phone, so your phone says protected when you remove it from your belt,
Another attachment, the ClickMate Wallet, adds a credit card holder, capable of holding three credit cards or forms of ID.
Perhaps the most useful attachment is the PowerPlus which adds a 1600mAh battery pack. In theory, you could keep multiples of these and snap them on as needed, to have indefinite power!
There's no telling what form factor an iPhone 5 might have, but it might be possible for NUU to release a new Foundation case for that phone that could also accommodate the preexisting attachments. It's not a guarantee, but it's a neat possibility thanks to NUU's decoupling of their attachments from the actual phone, and using the Foundation case as a 'hardware abstraction layer' much like programmers do!