Great for test-taking and anyone who needs a visual reminder of how much time is left. Features a red disk that disappears as time elapses. No ticking, no distractions and no setup required! Lens protects the lightweight, anti-static red disk. Includes volume control for the optional audible signal when time has expired. Molded ABS plastic with a carrying handle at the top. Measures 5-1/2 x 7". Requires 1 AA battery, sold separately.