The general-purpose digital electronic timer can repeat programs with 16 ON and 16 OFF settings for different uses for flexible scheduling. Advance preset a week before. Adjustment precision to the nearest minute. The built-in rechargeable battery and smart chip keep the programming settings even in the event of a power failure.Features :7 Day Programmable Digital Timer - General purpose digital electronic timer with daily and weekly schedules (10 different modes). Full time range from 1 min to 168 hours. Repeat programs with 16 ON and 16 OFF settings. Minute Setting Accuracy LCD Display: LCD displays real-time hours/minutes and ON/AUTO/OFF, large LCD display for easy reading, you can see each digit clearly.Built-in rechargeable battery - It has a built-in 1.2V/40mA rechargeable battery and an industrial-grade chip, so the device retains the programming setting even when the power fails.Easy Operation - Large screen and clear key button for easy and precise operation. D+(day setting), H+(hour setting), M+(minute setting).Wide Application: This timer switch can automatically turn on/off electrical equipment according to user-set time. With high precision and strong anti-interference ability, the timer switch is ideal for controlling street lights, neon lights, production equipment, radio and television and many other household appliances.Specification:Tension : 220V / 110V / 12V / 24V (optional) Rated contact voltage: AC 180V-264V 50/60Hz.Number of circuits: 1 changeover (SPDT) Error: 2S/day (25 On/off operation: 16 times on and off (manual/auto) Power: 4.5VA (maximum) 1min-168hours Battery Backup: 15 days Minimum interval: 1 minute Load capacity: 16A 250VAC Mechanical life: 10^7 Electrical Life: 10^5 Humidity: 35-85% RH Operating Temperature: -10 - 55 Mounting method: 36mm DIN rail Item size: 87*64*35mm/3.43*2.52*1.38in 1*digital timer switch