Features: 1. This product can automatically switch on and off the power of various powered devices according to the time set by the user. 2. Suitable for the automatic control of street lamp, neon lamp, advertising sign lamp, production device, broadcast television device and so on. 3. Adopt high precision industrial grade chip for accurate timing control. 4. Built-in rechargeable battery is used as a backup power supply to maintain the timing, display and store parameter in case of no external power supply. 5. ON-OFF time can be cycled by day or week, maximum 17 times ON-OFF. Specification: Working voltage: 220V AC/50-60Hz Control output: 30A Number of settings: 17 times ON and OFF(day/week) Setting time: 1 minute - 168 hours Time-keeping error: 1s/24h Power-off memory: 60 days (Built-in 1.2V rechargeable battery) Mounting method: 35mm DIN rail Dimensions: 90*70*35mm / 3.54*2.75*1.38in Weight: Approx. 145g/5.1oz Package list: 1 * Digital Timer Switch Note : 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding.