High-performance timer switch with three-wire input and output, eliminating the need for neutral wire connection. Supports up to 4kW power, avoiding contactor issues. Features 17 on/off settings, programmable from Monday to Sunday with 1-minute intervals. Max duration: 168 hours (1 week). Manual override available. Set once for continuous cycling. Suitable for 350V-420V AC three-phase motors and equipment like pumps, aerators, steamers, heaters, displays, lights, and fans. Enables automated operation with reliable performance. Built-in rechargeable battery retains settings during power outages��no need to reprogram. Practical and user-friendly design. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.