1. perfect for household use in DB Boards. 2. Repeat programs with 17 on/off settings, and setting on/off manually. 3.The Timer can open or close kinds of electrical apparatus and power automatically, according to the preset time. 4.The items can be streetlight, neon light (sign), billboard, electrical appliances, broadcast equipments etc., 5.The digital timer switch is a non rechargeable battery, in 1.2V/40Ma, high-accuracy CMOS chip, strongly anti-jamming, easy to use. Specifications: Temp.range: -20 Celsius+50 Celsius Power Supply:220V AC Power consumption 4.5 VA (MAX) Display: LCD Switching contact: 1 changeover switch Programs:17 on/off each day or week Hysteresis 1 sec/day (25 Celsius) Mini interval: 1min Black-out: 60 days Timer range: 1min~168h Recharge battery: 1.2V 40Ma Average error: 1s/24h, 25 Celsius Colour:white Material:ABS+electronic components Size:12.0cm x 8.0cm x 6.0cm Package Contents: 3 x Timer 3 x User 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.