220V / 110V Dark room timer

HDT-30 Dark room timer, made of hard plastic and PVC completesealed keyboard, can work long time in film washing room with acidity air, Has the function of quartz clock display, timeing, time count down, red light, music and sound alarm. Features Power :220V/110V　AC battery 6V(double battery) Timeing:1sec－30minutes Clock display:24 hours Size:180×120×50mm　 Weight:350g Dark room red light