Under voltage and over voltage protectorNoted: When you first connect the product, you have to wait about 1 minute, after the red light turn off, then the product will work.The automatic recovery over voltage and under voltage protective device complies with modular design standards. the circuit boards of products adopt good quality electronic components with reliable performance. when the power situation is unstable. Its protection function will be automatically activated. once the voltage exceeds the limited range of products, it will automatically cut off so as to protect the safely of electrical equipment and persons.The device will re-supply in 1 minute, when the power returns to normal.The green indicator display, when the power is normal supply.The red indicator display, when the power over voltage or under voltage.Installing: 35mm Din rail.Rated AC voltage 230V10% and frequency 50Hz/60HzPassing Max Current:40AMax. Loading power: 8.8KVAOver-voltage action cut-off value: Greater than 270VAC+/-5VNormal-voltage value: 175-270VACUnder-voltage action cut-off value: Less than 170VAC+/-5VOver voltage and under voltage cut-off: Less than 1sElectricity transmitting delay after cut-off: Less than 60sSelf power consumption Less than 2WElectric machinery life=100000 timesDimension: 35L x 70W x 77HmmInstalling: 35mm Din railColour:WhiteMaterial:plasticPackage Contents:1 x Under voltage and over voltage protectorOnly 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.