1、With a tiny error within 2 seconds, this timer switch guarantees a more accurate timekeeping and time displaying. 2、Equipped with 24 hour timing function, the full time range of the digital timer switch is 1 minute to 168 hours. 3、Programmable design makes it easier to adjustment the timing, which also allows for 96 times a day ON / OFF. 4、Liquid Crystal Display enables a clear time display, and the backlit design will show the time clearly in the dark. 5、A battery with a large capacity up to 520 mAh allows for longer operating time, and also very easy to change. Item Type: Digital Timer Switch Product Material: ABS Shell Model: TM929BK Display Mode: Liquid Crystal Display Backlight Working Voltage: 85-265VAC Load: 30A Power Consumption: <5VA Time Range: 1min-168hrs Power Failure: 90 Days Program: 96 Times A Day ON / OFF Average Error: <±2 Seconds / Day Temperature Range: -10-50℃ Humidity: <95% Installation Method: DIN RAIL Function: 1. Clock Display 2. Programmable Timer 3. With Backlight Battery Specification: Removable Button Battery CR2450 3V 520mAh 1 x Digital Timer Switch 1 x User Manual