PROFESSIONAL SURGE PROTECTION: This device can save your time and money by protecting your refrigerator and other appliances from high and low voltage, spike, instant surge, power failure, voltage fluctuation, brownout and load shedding, prolong the lifespan of your refrigerator. Saving a lot of maintenance costs for you! DOUBLE OUTLETS: One surge protector can protect two appliances at the same time, besides the refrigerator, you can also plug in your other appliances such as microwave, water cooler, dishwasher etc., saving your procurement cost! SIMPLE-TO-UNDERSTAND LED INDICATORS: Indicators for normal, high voltage(135VAC), low voltage(90VAC) and time delay. It automatically cuts off the power supply when the mains voltage drops below or above limit. Meanwhile, the corresponding indicator will also light up, current protection and voltage status at a glanced. DELAY FUNCTION: There is a 3 minutes time delay once the power returns to normal after a voltage fluctuation, to conf