High-performance timer switch, three-wire input and three-wire output, helping to solve the problem that some customers are unable to wire neutral. Maximum power reaches 4 kW, avoiding problems with connecting the contactor Just set the on or off time, a total of 17 on or off settings, Monday to Sunday, each setting can be set at least one minute apart, and the maximum time is 168 hours (equivalent to 1 week), which can be turned on and off manually temporarily. As long as it is set once, it can be constantly cyclical It is widely used in 350v-420vAC three-phase motor and other equipment such as water pump, fish pond oxygenation, rice evaporation machine, water heater, billboard, lampa neon, exhaust fan and so on. It can achieve unmanned management, safe and reliable, stable performance, it is a very good choice. Built-in battery, memory shutdown. No ma need to reset the program, convenient and practical. Voltage: 380V or 50-60Hz Control output: 16A (three-phase direct output) Setting times: 17ON or OFF (day or week) Set the time: from 1 minute to 168 hours Travel time error: 1s or 24h Power failure memory: more than 180 days (built-in 1,2V battery) Installation Size: 120x120x52mm or 4.7x4.7x2in Mounting method: screw, guide (35mm) Weight: about 467g or 16,5 oz List of packages: 1 x Programmable Time Relay