This handy timer offers four functions in one compact unit: timer, stopwatch, calendar, and clock. It times up to 24 hours in timer and stopwatch modes, timing as many as four activities at once with a loud tone that signals when time is up. The memory feature stores up to three different timer settings. A special calendar function displays day and date to the year 2099. The clock/timer operates on one "AAA" battery. Battery included. Versatile clip-on back converts to an easel stand and has a magnet for use on metal surfaces.