Made of high quality plastic material, durable and sturdy These DC Panel Voltmeter is specially designed for measuring and monitoring battery and electrical system Clear and easy to read scale and a button for fine tuning the dial Panel Voltmeter measures voltage range with accuracy of Class 2.5 Simple and convenient wiring, embedded installation Specification: Material: plastic Accuracy: class 2.5 Insulation resistance: 20MOmega/DC500V Damping time: 4s Conditions of use: -20 40, Relative humidity85% Storage temperature: -40 70 Insulation strength: AC voltage 50Hz, 2KV for 1 minute. Meter overall size: approx. 63x56x58mm Package Includes: 1 Piece DC Analog Panel Voltage Meter(2 Pack) Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.