Function Meter & 7 Monitoring Modes: Measures energy consumption and connected devices. Supports 7 monitoring modes including time, power, cost, cumulative power consumption, voltage, frequency, current, power factor, minimum power, maximum power, and electricity rate. Precision and Overload Protection: Features a built-in high-precision current sensor with accuracy class 1.0. Automatically displays OVERLOAD on screen when load exceeds 3680W to alert users. Backlight and Memory Function: Large LCD display with wide viewing angle and clear backlight. Retains meter readings and settings even when unplugged. Easy to Use: Made of ABS plastic, a safe and environmentally friendly material. Helps calculate appliance energy consumption. Compatible with various devices such as lights, kitchen appliances, TVs, audio systems, computers, game consoles, printers, ovens, and more. Simple Operation: Press FVNC to select monitoring mode, COST to set electricity rate, UP and DOWN buttons to adjust the rate, and RESET to clear all settings. Suitable for users of all ages.