Feature: 1. MAIN USE: The timing switch can be started and closed at a fixed time to make your home appliance work reasonably and prolong their service life. 2. POWER OFF MEMORY: The built in battery of the timing switch is used for program power off memory, which can save data for 60 days even if the power is off, without resetting the fixed switch program. 3. WIDE CONTROLLING RANGE: The timing switch has a time control range from 1 minute to 168hours, you can set the range you want to meet different needs. 4. WIDE APPLICATION: The timing switch is applicable to timing control of street lamps, advertising lights, electric boxes, water pumps, drainage pumps, water heaters, chargers and other equipment. 5. ABS MATERIAL: Made of premium ABS material, the switch is strong and sturdy, scratch resistant and impact resistant, ensuring a long life span. Specification: Item Type: Programmable Timer Switch Material: ABS Power Supply: AAA battery x 1 (shipped without battery) Switching Capacity: Resistive 25A Number of Programmable Groups: 8, 10, 16 groups Time Control Range: 1 minute to 168 hours Timing Error: <± 2s/day Relative Humidity: Less than 95% Ambient Temperature: - 10 ℃ to 50 ℃. Package List: 1 x Programmable Timer Switch