About this item 20 amp Surge Protector: The single surge protector outlet protects against high and low voltage, brownout, spike, instant surge, power failure, voltage fluctuation, and load shedding. Whole House Surge Protector: The power surge protector outlet is ideal for refrigerators, air conditioners, freezers, ice makers, washing machines, ovens, microwave ovens, dishwashers, coffee machines, bread machines, water heaters, electric fans, and other large home appliances. Installation: Connect the equipment to the surge protector and then plug it into the outlet. The delay time is 3 minutes. After plugging it in, you need to wait 3 minutes for the current to pass through the appliance surge protector. Then the voltage will stabilize, and the first green light will illuminate. The surge protector begins to protect your appliances. Multiple Scenarios Available: 20 amp operating voltage is 120 VAC. Under voltage cut-off is 90 VAC. Over voltage cut-off is 140 VAC. 2400 Watts, 50 HZ-60