This timer switch could automatic turn on/off all kinds of electric equipment according to the time user set. It has a built-in rechargeable battery and a industrial grade chip. With high preciseness and strong anti-interference ability, the timer switch is great for controlling street lamps, neon lamps, production equipment, radio and television and many other home appliances. Specifications: Input Voltage: AC/DC12V, AC/DC24V, AC110V, AC220V(Optional) Voltage Rating: AC 180V to 264V(50/60Hz) Load Capacity: 25A 250VAC(resistive load) On/Off 16 on and 16 off(manual/auto) Display: LCD Power: 4.5VA(max) Error: ≤2s/day(25℃) Mounting Method: DIN rail(not included) Bound: 1 min to 168 hours Operating Temperature: -10℃ to 55℃ Size: 86 x 36 x 65mm / 3.38 x 1.41 x 2.56" Quantity: 1 Instruction: 1, When you use the timer switch for the first time, input AC and the inbuilt battery please, then press reset button. 2, The timer switch is at 24-hour mode as default. Press and hold "time" button(bottom left, next to "reset") for 5 seconds till it display "AM" to set to 12-hour mode. Press and hold again "time" button for 5 seconds to set back to 24-hour mode. Package Includes: 1 x Timer Switch 1 x English Manual