This is a voltage protector designed for automatic protection of home appliances in case of under-voltage, over-voltage, and power interruption. Low or high supply voltage may affect normal operation, reduce service life, or damage compressor motors in air conditioners, refrigerators, and freezers. Sudden power outages and subsequent restoration can cause voltage surges that may harm compressors. This device automatically disconnects the load and provides a delayed restart to protect compressors.Applications: 1. Plug the protector into a wall outlet, then plug the appliance (e.g., air conditioner, refrigerator, freezer) into the protector’s output socket. 2. The unit can be mounted on a wall using the hanging hole on the back.Compatible devices: Air conditioners, refrigerators, freezers.Important notes: 1. Do not install in high-temperature or high-humidity locations. 2. Avoid use in dusty or highly oxidized environments, as this may lead to premature failure.Specifications: 1. Input voltage: 220V, 50Hz / 110V, 60Hz 2. Voltage protection range: 90V ±3% to 130V ±3% (60Hz); 180V ±3% to 250V ±3% (50Hz) 3. Maximum current rating: 16A 4. Restart delay time: 180 seconds 5. LED/LCD display shows real-time voltage and operating status 6. Five protection modes: over-voltage, under-voltage, power interruption, surge/spike, and overload Product dimensions: 5.2 × 9 × 3.5 cm Also suitable for: TVs, LCD/Plasma displays, DVD players, home theater systems, PCs, laptops, washing machines, dryers, ovens, dishwashers, and other non-compressor household appliances.