Specifications: Input Voltage: AC/DC12V, AC/DC24V, AC110V, AC220V(Optional) Contact Voltage Rating: AC 180V to 264V(50/60Hz) Load Capacity: 25A 250VAC(resistive load) On/Off Operation: 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 charge 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. Programming: Step Button Programming 1 Press P Setting"1 ON" time(display 1 on) 2 Press D+ Select days of week(if you want same set for every day, you do not need to press this button) 3 Press H+/M+ Set hours and minutes 4 Press P Setting "1 OFF" time(display 1 off) 5 Press P Select days week(If you want same set for every day, you do not need to press this button) 6 Press H+/M+ Set hours and minutes 7 Repeat step 2 to 6 Set other on/off time 8 Press "time"(bottom left, next to "reset") End Package Includes: 1 x Timer Switch 1 x English Manual