A door is slid open revealing a clock face and small dial. Attached to the dial is a knob that allows the dial to be set to any of the HOURS on the clock face. Stepping aside with your back turned away you request that the spectator select an hour of the day and turn the dial to that hour. The spectator then closes the door which completely covers the clock face. (There is NO way to see the clock face once the door is closed.) Without having to see the clock face, you instantly reveal the selected time! The Wonder Clock stands 2.2 inches tall to fit nicely in the palm of your hand. The Wonder Clock is hand crafted to precision and is a limited production piece.