This is a Multi-Function Protector, also known as a voltage protector or smart socket, designed to safeguard electrical devices such as fridge, TV, computers, printers air conditioner etc.
Comprehensive Protection: It integrates overvoltage, undervoltage, overcurrent, and leakage protection to prevent damage to appliances.
Voltage Regulation: It can regulate incoming voltage to maintain a safe and steady output, protecting sensitive equipment like refrigerators from fluctuations.
Energy Monitoring: like the one shown, can also measure power consumption (kWh) and display voltage (V), current (A), and frequency (Hz).
Automatic Reconnection: It often features an auto-reset function and a delay when power returns to normal to prevent damage from power-back surges. Ideal for both home and office use and electronic equipment.