C.A.P. is no longer in business, we recommend going with an alternative, comparable replacement controller such as the Titan Apollo 12. The ART-DNe recylcing timer by Custom Automated Products controls any application requiring a device to be turned on and off at precise intervals. The ART-DNe has a user adjustable on time of 1 second to 40 minutes and an off time of 1 minute to 8 hours. A day/night/both switch allows you to select the time period that the ART-DNe will operate. The ART-DNe timers have a wide range of uses including controlling hydroponic pumps, simple CO2 controller, turning on and off ozone generators, running exhaust fans, etc. ART-DNe timers are rated for 15 amps @ 120 volts • The ART-DNe simply plugs into a 15 amp, 120 volt outlet.• The ART-DNe can control up to 15 amps @ 120 volts. • The ART-DNe has an on time of 1 second to 40 minutes and an off time of 1 minute to 8 hours. Manufacturers Instructions: http://www.randmsupply.com/images/link/ART-DNeInstructions.pdf * This is a refuribished unit direct from the C.A.P. factory. Returns can be handled either through Growers House or C.A.P. for the entire 5 year warranty. (We use the refurbished units in our retail store gardens and they work great!)