The Grozone Cyclestat with Photocell is a cycle timer that allows gardeners to control any 120-volt pump, fan or other device on a periodic repeat cycle. Its ON duration spans from 10 seconds to 20 minutes, and its OFF duration spans from one minute to 12 hours. It can function day and night, or during day or night time only. The Cyclestat with Photocell is protected by a three-year manufacturer’s warranty, and also includes a user guide and a mounting kit.