2 pack voltage protector brownout surge refrigerator 1800 watts appliance nippon america 1800 watts refrigerator voltage protectors use on: refrigerators, freezers, water coolers or any appliance with a max current of 10 amps. protect your appliance from high voltage (140 vac) or low voltage (90 vac) by interrupting the current flow. how to use: once the voltage returns to normal, the wait signal will turn on for 3 minutes. after this period, the normal light will turn on which will allow the current to flow. over voltage disconnection 3 minutes safety cycle 3 modes led indicator detachable ground wire 175 joules 1800 watts 1/2 hp quantity: 2 pieces