This overvoltage protector adopts advanced microcontroller module control and has multiple protection functions. It has a delay of 30 seconds, clear function indication, under voltage protection (170V) indicator light on, while the delay light flashes, the power is cut off and the output is automatically restored when the voltage is normal (with a delay of 30 seconds), over-voltage protection (270V) indicator light on, while the delay light flashes, the power is cut off and the output is automatically restored when the voltage is normal (with a delay of 30 seconds) This product is suitable for household appliances such as refrigerators, washing machines, televisions, etc.