This voltage protector is designed for automatic protection of 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, reduce appliance lifespan, or damage compressor motors in air conditioners, refrigerators, and freezers. Sudden power outages and reconnections can create strong voltage surges that are harmful to compressors. This device automatically disconnects the load and provides a delayed restart to ensure safe power reconnection, offering effective protection for compressor-based appliances. Applications: Plug the protector into a wall outlet, then connect the appliances such as air conditioners, refrigerators, or freezers into the output socket of the protector. The unit can be mounted on a wall using the built-in hanging hole on the back case. Compatible appliances include air conditioners, refrigerators, and freezers. Usage 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: - Input voltage: 220V, 50Hz or 110V, 60Hz - Voltage protection range: 90±3% to 130±3% (for 110V systems), 180±3% to 250±3% (for 220V systems) - Maximum current: 16A - Restart delay time: 180 seconds - LED/LCD display shows real-time voltage and operating status - Provides five types of protection: over-voltage, under-voltage, power interruption, surge/spike, and overload 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.