Features AC Meter: Measures AC voltage range from 20‑500V and current range from 0‑100A, providing accurate readings for various electrical appliances. 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. 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. 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 operation. 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. 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 operation. 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 How to Use: Take out the product, install it properly, and you can start using it. packing list: 1 x AC Voltage Current Meter 1 x Current Transformer Notice: 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