Functionality: It is designed to protect electrical appliances from damage caused by fluctuations in voltage (both over-voltage and under-voltage) and over-current.
Adjustable Settings: It allows users to set specific thresholds for over-voltage protection (e.g., 230V-300V), under-voltage protection, and over-current protection (e.g., 1A-63A).
Automatic Disconnection/Reconnection: The device automatically disconnects the power supply when voltage or current levels exceed or fall below the set safe limits and reconnects when conditions return to normal after a set delay time (e.g., 1-500s).
Display and Measurement: It features a digital display (likely LED) that shows real-time voltage (V~) and current (A~) readings. Some models also include an energy meter function.