ONE: Simple wiring,220V input, 220V output, no need to ask an Electrical Engineer,you can do it by yourself at home. TWO: Excellent load capacity, upto 6500Watt,30AMP@250Vac. THREE: Easy program, everyone can program it after he reads the manual JUST one time. FOUR: Stable performance because of professinal manufacturing in power saver since 2002. Five: Confirm to CE approval, LVD and EMC passsed. Feature : * You can use the tier to SWITCH ON/OFF any elctrical equipments at a preset timer * Ideal for household use in DB Boards * 6500 Watt / 30 Amps * 24 hours / 7 days a week programmable * Built-in battery for backup the memory (save the programs you set)when power failure * Auto time error correction +/- 30 sec, weekly * Repeat programs with 17 on/off settings, and setting on/off manually Specification : Model : TM616 Temp.range: -20°C+50°C Ui:220~240V, 50/60Hz Power consumption 4.5 VA (MAX) Display: LCD Switching contact: 1 changeover switch Programs:17 on/off each day or week Hysteresis 2 sec/day (25°C) Mini interval: 1min Capacity: 30(16) 250V AC Black-out: 60 days Timer range: 1min~168hr Recharge battery: 1.2V 40Ma Average error: 1s/24h, 25°C Weight: 0.39kgPackage included: 1 x Programmable Timer 1 x English User Manual