About this item 4 Led Indicators: Light indicators for Normal Voltage, Over Voltage, Low Voltage and Waiting Cycle. 4 Mode Led Indicator can let you know the power status of your home appliances in a simple and clear way. Directly Plug In DesignEasy to use. Professional Protection: Protect against high and low voltage, brownout, spike, instant surge, power failure, voltage fluctuation and load shedding. Best Surge Protector for Home Appliance: Suitable for Refrigerator, Air Conditioners, PC, TV, Freezers, Ice Makers, Washing Machines or other valuable household electronic. 3 Mins Period Time: Sometimes multiple voltage surges may occur within one minute. A short-term delay surge protector can cause the refrigerator power cycling quickly, potentially causing significant damage to the compressor. To protect your valuable home appliances, we recommend using this surge protector with a 3-minute delay. Size: 3.94 x 2.56 x 0.04 inches