DC 12V 16A LCD Digital Timer Switch Electronic Power Time Relay Programmable Features: Advanced preset a week earlier. Digital electronic time switch with daily programs. Repeat programs with 17 on/off settings and manual override. Power reserve of the lithium battery in case of power failure. Auto timer error correction + 30 seconds, weekly. panel mounted. Specification: Display device: LCD Power consumption:<1W Product net weight: 80G Working Temperature: -20℃ ~ +55℃ Working voltage: 12V Time range: 1 minute to 168 hours Running Time Error: 1S/24H 25°C Number of trips: 16 switches (day / week) Internal battery: 1.2V/40mA (rechargeable battery) Dimensions: 60mm * 60mm * 32mm (height * width * thickness) According to the installation method: screw, plug connection conforms to the standard: GB / T14536.1 Instructions: Beijing Time Calibration Press the “Clock” button and then press the “Minute”, “Time” and “Week” buttons to adjust Beijing Time. Timing Settings A. Press the “Timer” button and the word “1 ON” will appear at the bottom left of the display (this shows the first time). Then press the "Minute", "??", "Week" buttons to enter the desired opening time. B. Press the “Timer” button and the word “1 OFF” will appear at the bottom left of the display (this indicates the first off time). Then press the "Minute", "Hour" and "Week" buttons to enter the desired closing time. C. Keep pressing the “Timer” button, and the lower left corner of the display will show in sequence (2 ON, 2 OFF...16 ON, 16 OFF). Refer to steps A and B to set the switching time. If you only need to turn it on and off once, you need to press the “Cancel/Resume” button to cancel the time you set. D. Press “Set” button and then press “Week” button to set same cycle mode with same daily, different daily, Monday to Friday, Monday to Saturday or Saturday to Sunday. Package included: 1 x programmable time switch