This is a voltage protector designed to automatically safeguard home appliances against under-voltage, over-voltage, and power outages. If the supply voltage is too low or too high, it may disrupt normal operation, shorten appliance lifespan, or damage compressor motors in air conditioners, refrigerators, and freezers. Sudden power interruptions and restarts can create strong voltage surges that are harmful to compressors. This device immediately disconnects the load and provides a time-delayed restart to protect the compressor.Applications: Plug the protector into a wall outlet, then connect the air conditioner, refrigerator, or freezer into the output socket of the protector. The unit can be mounted on the wall using the built-in hanging hole on the back.Compatible Devices: Air conditioners, refrigerators, freezers.Important Notes: Do not install in areas exposed to high temperature or moisture. Avoid using in dirty environments where plug oxidation may occur, as this could lead to premature damage.Specifications: - Voltage: 220V, 50Hz or 110V, 60Hz - Voltage Range: 903%1303% (60Hz); 1803%2503% (50Hz) - Current Rating: Up to 16A - Delay Time: 180 seconds - LED/LCD display shows real-time voltage and operating status - Provides 5 types of protection: over-voltage, under-voltage, power interruption, surge/spike, and overloadProduct Dimensions: 5.2 x 9 x 3.5 cmSuitable for use with TVs, LCD and plasma displays, DVD players, home theater systems, computers, laptops, washing machines, refrigerators, dryers, ovens, dishwashers, and other household appliances without compressors.