Features Comprehensive Electrical Measurement: Accurately measures voltage, current, active power, energy, frequency, and power factor, providing essential data for efficient energy management Overload Alarm Alerts: Features an alarm system that activates when power exceeds preset thresholds, ensuring safety and preventing equipment damage Customizable Alarm Thresholds: Allows users to set specific power alarm thresholds, offering personalized monitoring for various applications Easy Energy Reset Function: Quickly reset energy data with a simple key press, making it convenient for daily energy tracking and monitoring Data Retention During Power Loss: Automatically stores measurement data when power is lost, ensuring you never lose critical information during outages Features: 1、AC Meter: Measures AC voltage range from 20？500V and current range from 0？100A, providing accurate readings for various electrical appliances. 2、Clear LED Display: AC current voltage meter features HD screen with wide viewing angle, large and clear digits, allowing easy and clear reading of data at a glance. 3、Easy Installation: Compact size of 37 x 85 x 50mm, designed for 2P installation position on 35mm standard mounting rail, simple wiring and clear model parameters for easy installation. 4、Wide Application: Voltmeter ammeter is suitable for monitoring and displaying AC voltage and current in various industrial, commercial, and residential electrical systems, providing real time data for safe . 5、 Materials: Made of premium PC flame retardant material, this voltage current meter is sturdy and with high impact resistance, ensuring safety and reliability for long term use. Specification: Item Type: Digital Voltmeter Ammeter Material: Flame Retardant PC Voltage: AC20-500V Current: 0-100A Size: Approx. 37 x 85 x 50mm / 1.46 x 3.35 x 1.97in Package List: 1 x AC Voltage Current Meter 1 x Current Transformer Note: The product cannot be used to measure batteries, electric vehicles, frequent start up fields, non sinusoidal inverters, soft starters, variable frequency drives, etc., it will burn out the instrument!!! Package List 1 x AC Voltage Current Meter 1 x Current Transformer