At first glance, this concept looks like a simple strap with a watch shape, but the secret is beneath the first strap. If you ‘peel’ the strap, you will see a classical vertical time display in LED. The LEDs are off when they are hidden by the strap. A simple sensor switches the LEDs on when peeling the strap.
There is no mechanical lock system. The whole strap is made of two rubber parts and will fit to most wrist sizes. The two straps are welded together only along the half of the contact surface. Two buttons on the back are for time setting.