High performance timer switch with three-wire input and output, designed to address installation challenges where neutral wire connection is not preferred. Supports a maximum load of 4 kW, eliminating the need for contactor integration. Offers 17 programmable on/off settings per week, allowing scheduling from Monday to Sunday with time intervals as short as one minute and durations up to 168 hours (7 days). Features manual override for temporary on/off control. Once programmed, the schedule runs continuously in cycle mode. Suitable for use with 350V–420V AC three-phase motors and various applications including water pumps, pond aerators, steam rice cookers, water heaters, billboards, neon lights, exhaust fans, and more. Enables unattended operation with reliable and stable performance. Built-in rechargeable battery maintains settings during power loss, ensuring program memory retention without the need for reconfiguration. Convenient and practical for automated control.