Ⅰ. Suitable for household use in DB Boards 3500 Watt / 16 Amps Ⅱ. 24 hours / a week programmable Ⅲ. Built-in rechargeable Battery for backup the memory when power failure Ⅳ. Auto time error correction +/- 30 sec, weekly Ⅴ. Repeat programs with 17 on/off settings, and setting on/off manually Ⅵ. Technical Data: Ⅶ. Model:TM919A-2 220V AC Ⅷ. Temp.range: -20C+50C Ⅸ. Power consumption 4.5 VA (MAX) Ⅹ. Display: LCD Ⅺ. Switching contact: 1 changeover switch Ⅻ. Programs:16 on/off each day or week XIII. Hysteresis 2 sec/day (25C) XIV. Mini interval: 1min XV. Capacity: 16(8) 250V AC XVI. Black-out: 60 days XVII. Timer range: 1min~168hr XVIII. Recharge battery: 1.2V 40Ma XIX. Average error: 1s/24h, 25C XX. Colour:White XXI. Material:Plastic XXII. Package Contents: XXIII. 1x Timer Switch TM919A XXIV. Only the above package content, other products are not included. XXV. Note: Light reflection and different displays may cause the color of the item a little different from the real thing. The measurement allowed error is +/- 1-3cm.