The APCTART2 is a cycle timer controller with day and night detection. It works to control any application requiring a device to be turned on and off at precise intervals. This timer has a wide range of uses including controlling hydroponic pumps, CO2 injection, turning on and off exhaust fans, misters and more. The cycle timer is adjustable for operation during the day, during the night, or all of the time (24 hours). We added a Memory-lock feature which will lock the set points into memory for consistent performance, even if the knobs are accidently bumped. Controls 120V pumps, fans, and more on a periodic repeat cycle Adjustable ON duration spans from 1 second to 60 minutes Adjustable OFF duration spans from 1 minute to 14 hours Built-in photocell Functions during the day, during the night, or 24 hours 120v, 15 amps max