Features Save Energy: Set schedules to control your indoor and outdoor lights, fans, radio, television and many other home appliances to turn on and off automatically at the present time, save costs on electricity. Advanced Pre-setting: The digital timer can pre-setting one week before; Digital electronics general purpose time switch with daily and weekly programs. Customizable: This light switch timer has 16 ON and 8 OFF settings per day, 7-day programming; It is easy to set up programs, each with weekly programming options, settings can be as short as one minute. Safe to Use]: The timer switch has a built-in 1.2V/40mA rechargeable battery and a industrial grade chip, which can protect your programs during power outages. LCD Display and Easy to Install: LCD displays real time to Hour/Minute and ON/AUTO/OFF; DIN rail installation, DIN rail is not included. Specifications: Input Voltage: AC/DC12V, AC/DC24V, AC110V, AC220V(Optional) Current: 15A Power: 3000W Contact Voltage Rating: AC 220V(50/60Hz) Switching Capacity: Resistive 16A On/Off Operation: 16 on and off(manual/auto) Display: LCD Power:  <4W Error: ≤2s/day Mounting Method: DIN rail(not included) Bound: 1 min to 168 hours Operating Temperature: -10℃ to 50℃ Size: 86 x 36 x 65mm / 3.38 x 1.41 x 2.56" Quantity: 1 Instruction: 1, When you use the timer for the first time, input AC and charge the inbuilt battery please, then press reset button. 2, The timer 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 1 x English Manual Package List