High-performance timer switch, three wire input and three wire output, helping to solve the problem that some customers are unable to wire the neutral wire. The maximum power reaches 4 kW, avoiding problems with connecting the contactor Just set the on / off time, a total of 17 on / off settings, Monday to Sunday, each setting can be set at an interval of at least one minute, and the maximum time is 168 hours (corresponding to 1 week), which can be turned on and off manually temporarily. As long as it is set once, it can be cycled continuously It is widely used in 350v-420vAC three-phase motor and other equipment, such as water pump, fish pond oxygenation, rice steaming machine, water heater, billboard, neon lamp, exhaust fan and so on. It can achieve unmanned management, safe and reliable, stable operation, is a very good choice. Built-in rechargeable battery, memory shutdown. No need to reset the program, convenient and practical. Voltage: 380V / 50-60Hz Control output: 16A (three-phase direct output) Setting times: 17 ON / OFF (day / week) Set the time: from 1 minute to 168 hours Travel time error: 1s / 24h Power failure memory: over 180 days (built-in 1.2V battery) Installation size: 120 x 120 x 52mm / 4.7 x 4.7 x 2in Mounting method: screw, guide (35mm) Weight: Approximately 467g / 16.5oz Package List: 1 x programmable time relay