Feature:1. With countdown function, maximum 24 hours countdown to OFF.2. 35mm DIN rail mounting, easy to operate, great for household use.3. Supports 24 hours / 7 days a week programmable.4. LCD digital display, LED indicator, reading is more intuitive and clear.5. 16 ON/OFF programs per day, 15 combinations to a week.6. Large capacity built-in CR2450 battery for back-up the memory (save the programs you set) when power failure.7. Repeat programs with 16 on/off settings, and setting on/off manually.Specification:Condition: 100% Brand NewItem Type: Timer SwitchMaterial: PlasticColor: As picture shownFunctions:Clock display(12hr/24hr format)TimerCountdown Power Supply: 12V DCCapacity: 30A 5000WTiming Range: 1min-168hoursPrograms: 16 ON/OFF per dayPower Consumption: <5VAAverage Error: <2S/dayTemperature Range: -10-50Humidity: <95%.Package List:1 x Timer Switch1 x InsturctionNote:This product is built-in battery.