Characterisitcs: 24 hours / a week programmable Built-in battery for backup the memory when power failure Auto time error correction +/- 30 sec, weekly Standard working power supply Voltage: 220V 50HZ Voltage range:175-250V Capacity: 25A Display: LCD Timer range: 1Second~168hours Regular Timer:18 times on/off each day or week Mini interval: 1 mins Hysteresis: 2s/day (25°C) Average error: 1s/24h, 25°C Battery power: 5 year Power consumption 1 VA (MAX) Temp.range: -25°C~+60°C mounting: DIN rail type: Electronic Timer color:Grey Material:plastic Package Contents: 4 x Digital Timer 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.