1. Easy to read LCD display, LED indicators. 2. 16 ON/OFF programs per day, 15 combinations to a week. 3. 24 hours / a week programmable. 4. Countdown function. Max 24 hours countdown to OFF. 5. Replace battery CR2032 for back-up the memory (save the programs you set) when power failure.Repeat programs with 16 on/off settings, and setting on/off manually. for household use in 35mm DIN Rail mounted. Functions: 1.Clock display(12hr/24hr format 2.Timer 3.Countdown Parameters: 1.Power Supply: 220V AC 50/60Hz 2.Capacity:16A 3.Timing Range:1min~168hours 4.Programs:16 ON/OFF per day 5.Power consumption:Less than 5VA 6.Black-out:90 days 7.Average error:Less than 2sec/day 8.Temperature range:-10~50 Celsius 9.Humidity :Less than 95% 10.Installation:87 x 65 x 36mm Model Number: TM919A-2 Usage: Industrial : Digital Type: Mini Replace Battery: CR2032 for saving programs Output: Switch Output 1NO+1NC color:White Material:ABS Package Contents: 4 x Timer Switch TM919 4 x English Manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.