This voltage protector is designed to automatically safeguard home appliances against under-voltage, over-voltage, power interruptions, surges, and overload conditions. If the supply voltage is too low or too high, it may affect appliance performance, reduce service life, or cause damage to compressor-based devices such as air conditioners, refrigerators, and freezers. Power outages and sudden power restoration can generate harmful voltage surges. This device automatically disconnects the load and provides a delayed restart to protect sensitive components like compressors. Application: Plug the protector into a wall outlet, then connect your appliance—such as an air conditioner, refrigerator, or freezer—into the output socket. The unit can be wall-mounted using the built-in hanging hole on the back. Compatible with: air conditioners, refrigerators, freezers, TVs, LCD and plasma displays, DVD players, home theater systems, PCs, laptops, washing machines, dryers, ovens, dishwashers, and other household appliances. Note: Avoid installing in areas exposed to high temperature, moisture, dust, or corrosive environments. Operating with dirty contacts or oxidized plugs may lead to malfunction or premature failure. Specifications: - Input voltage: 110V 60Hz / 220V 50Hz - Voltage protection range: 90±3%–130±3% (60Hz), 180±3%–250±3% (50Hz) - Maximum current: 16A - Restart delay: 180 seconds - Display: LED/LCD shows real-time voltage and operating status - Protection types: Over-voltage, under-voltage, power interruption, surge/spike, and overload - Product dimensions: 5.2 x 9 x 3.5 cm Suitable for use with various household electronics and appliances.