Usage Tips:Perfect for household use in DB Boards 3500 Watt / 16 Amps 24 hours / 7 days a week programmable Built-in rechargeable Battery for backup the memory when power failure Auto time error correction +/- 30 sec, weekly Repeat programs with 17 on/off settings, and setting on/off manually Technical Data: Model:TM919A-2 220V AC Temp.range: -20°C+50°C Power consumption 4.5 VA (MAX) Display: LCD Switching contact: 1 changeover switch Programs:16 on/off each day or week Hysteresis 2 sec/day (25°C) Mini interval: 1min Capacity: 16(8) 250V AC Black-out: 60 days Timer range: 1min~168hr Recharge battery: 1.2V 40Ma Average error: 1s/24h, 25°C Colour:White Material:Plastic Package Contents: 1x Timer Switch TM919A 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.