On some days, you don’t want to know what time it is every. single. hour. As the day drags on, you prefer to ignore the fact that just thirty minutes have gone by. This petite, wood veneer alarm clock only displays the time when it hears a loud sound, like a clap or knock. For example, when you bang your head on the desk waiting for lunchtime to arrive. In this way, the Clap Alarm Clock saves energy. The sensitivity of its sound sensor depends on each specific sound environment. It features a 12 hour (am/pm) or 24 hour clock display, alarm function, LED display and a pretty sweet modern design.