Perfect for household use in DB Boards 3500 Watt or 16 Amps 24 hours or 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 or off settings, and setting on or off manually Technical Data: Model:TM919A-2 220V AC Temp.range: -20Cand50C Power consumption 4.5 VA (MAX) Display: LCD Switching contact: 1 changeover switch Programs:16 on or off each day or week Hysteresis 2 sec or day (25C) Mini interval: 1min Capacity: 16(8) 250V AC Black-out: 60 days Timer range: 1min-168hr Recharge battery: 1.2V 40Ma Average error: 1s or 24h, 25C 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.