brand new and high quality Features: 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. It's for 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. Under Voltage Protector only,other accessories demo in the picture is not included. Specification: Rated AC voltage 230V10% and frequency 50Hz/60Hz Passing Max Current: 40A Over-voltage action cut-off value: >270VAC+/-5V Under-voltage action cut-off value: