Paterson Photographic Triple TimerA battery operated timer that can be used as a clock, stop watch or a threestage timer. The three countdown stages can be run simultaneously or asseparately switched timers each counting up again after reaching zero. The timer gives audible signals at the end of each time period. Times can be set up to 20 hours. Stopwatch measures to 1 100 second. 12 or 24 hour clock displayAAA Battery included