【Practical】: Programmable time relay, three-wire input, three-wire output, which solves the problem that some customers are inconvenient to connect the neutral wire. The maximum power reaches 4kW, eliminating the trouble of connecting contactors. 【Time Programmable】: Just set the on/off time, there are 17 on/off settings in total, from Monday to Sunday, any setting is at least one minute apart, the maximum time is 168 hours (equivalent to 1 week), can be temporarily manual On and off. Just set it once and it can loop forever. 【Wide application】: Time relay suitable for three-phase 350V-420V AC motors, such as water pumps, fish pond oxygenation, rice steamers, water heaters, billboards, neon lights, exhaust fans and other equipment. 【Excellent performance】: Timer switch can realize unmanned management, safe and reliable, and stable performance. It is a good choice. 【Memory function】: The switch has a built-in rechargeable battery, which can be remembered when power is off. No need to reset the program, convenient and practical.