1. Simple wiring, 110V input,110V output, no need to ask an Electrical ,you can do it by yourself . 2. load capacity, upto 6500Watt,30AMP. 3. Easy , everyone can it after he reads the manual JUST one time. 4. Stable per suitable formance because of professinal manufacturing in power saver since 2002. parameter You can use the tier to SWITCH ON/OFF any elctrical equipments at a preset timer Perfect suitable for household use in DB Boards 6500 Watt / 30 Amps 24 hours / 7 a week programmable Built-in battery suitable for the memory (save the programs you set)when power failure Auto time error correction +/- 30 sec, weekly Repeat programs with 17 on/off , and setting on/off manually Colour:Black Material:ABS+electronic components Size:12.0 cm x 8.0 cm x 6.0 cm Package Contents: 1 * Timer switch 1 * Manual Only the above package content, other products are not included. Note: Light 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.