The AgroMax digital recycling timer controls any device to be turned on and off at precise intervals. It has a large digital LCD display allowing user adjustable settings. ON or OFF times are 10 seconds and 99 hours respectively. A photo sensor with user controlled day/night/both button, allows users to select the photo period that the Digital Short Cycle Timer will operate. A built in rechargeable Ni-MH backup battery stores timing settings in case of a power outage or failure. 120 Volts/15 Amps/60 Hz. Great for cloners!