The Embrace-4 iPhone 4 / 4S aluminum bumper uses the affection of hands embracing the mobile device as an inspiration. The core tool-less knob design of Embrace-4 comes close to the classic esthetics of a watch. The experience of winding a manual watch knob on a mobile device with efficiency and convenience is unprecedented. The rotating shaft is not visible, yet balances the right aluminum frame into place; the left aluminum frame then wraps into position to “embrace” and protect your mobile device. Turn the knob to see the intimate connection between humans and mobile devices come to life.