High-performance timer switch, three-wire, three-wire input and output, which helps to solve the problem that some customers do not want to wire the neutral wire. The maximum power reaches 4kW, which avoids contactor connection problems. Just set the on/off time, with a total of 17 on/off settings. From Monday to Sunday, each setting can be set at least one minute apart, and the maximum time is 168 hours (equal to 1 week), which can be manually turned on and off temporarily. As long as it is set once , it can be cycled continuously Programmable time response is widely used in 350v-420vAC three-phase motors and other equipment such as water pump, fish pond oxygenation, rice steamer, water heater, display board, neon light, exhaust fan, etc. This timer response can achieve unmanned management, safe and reliable performance, stable performance, is a very good choice. Built-in rechargeable battery, power off the memory. No need to reset the program, convenient and practical.