This is a voltage protector designed to automatically safeguard home appliances against under-voltage, over-voltage, and power interruptions. If the supply voltage is too low or too high, it may affect normal operation, shorten appliance lifespan, or damage compressor motors in air conditioners, refrigerators, and freezers. Sudden power outages and re-energizing can create harmful voltage surges that may damage compressors. This device immediately disconnects the load and provides a time-delayed restart to protect the compressor. Applications: Insert the protector plug into the wall outlet, then connect the air conditioner, refrigerator, or freezer to 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, and freezers. Note: Do not install in areas exposed to high temperature or moisture. Avoid using in dirty environments where severe oxidation of the plug may occur, as this could lead to premature failure. Specifications: - Voltage: 220V, 50Hz or 110V, 60Hz - Voltage range: 90±3%–130±3% (60Hz); 180±3%–250±3% (50Hz) - Maximum current: 16A - Start-up delay time: 180 seconds - LED/LCD display shows operating voltage and status - Provides five protection modes: over-voltage, under-voltage, power interruption, surge/spike, and overload protection Product dimensions: 5.2 x 9 x 3.5 cm Suitable for use with TVs, LCD and plasma displays, DVD players, home theater systems, PCs, laptops, washing machines, refrigerators, dryers, ovens, dishwashers, and other household appliances without compressors.