This multifunctional meter is designed to accurately measure and display AC voltage, AC current, active power, electric energy, power factor, and frequency. It is ideal for monitoring and testing electrical systems in residential and commercial settings. The meter features an auto-saving function that preserves the electric energy data during power outages, ensuring continuous tracking once power is restored. Specifications: AC Voltage Measurement: 200V-450V AC Current Measurement: 0-100A with a minimum resolution of 0.01A Active Power Measurement: 0-45000W with varying display accuracy based on power range Electric Energy Measurement: 0.000-99999kWh with varying display accuracy based on energy range Power Factor Measurement: 0.00-1.00PF Frequency Measurement: 45-65Hz Accuracy: 1% + 2 digits Measurement Speed: 2 readings per second Dimensions: 80mm x 43mm x 48mm Installation Size: 76mm x 39mm Auto-saving Feature: Retains electric energy data when power is off Color: As shown Material: ABS Package Contents: 1 x Voltmeter Ammeter Power Energy Frequency Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.