Functions: 1.Over- protection 2.Under- protection 3.Automatic 4. 63A 230V 50/60Hz Din Rail Adjustable Automatic Over And Under Protector Protective Device Color: white Material: plastic Product Parameters: 1.Model number:SVP-912 2.Power supply:230VAC 50/60Hz 3.Max.Loading power: 63A 4.Over- protection value range:221V~300~OFF(default:280V)Over- range:220V--299V(default:250V)Over- protection action time:0.1s~10s(default value:0.1s) 5.Under- protection value range:219V--150V --OFF(default:160V)Under- range:151V--220V (default:180V)Under- protection action time:0.1s~10s(default:0.1s) 6. delay time:2s~512s(default:60s) 7.Delay time after power-on:2s~255s(default:2s) 8.Power consumption: Less than 2W 9.Electric machinery life: 100,000 10.Installation:35mm DIN rail : When you first connect the product, you have to wait about 1 , after the red light turn off, then the product will work. Package Contents: 1 x Relay 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.