0.36 Inch DC0-30V 3 Bits Digital LED Display Panel Voltmeter Tester Digital LED Mini Display Module for Car Motor Vehicle Tools. Features include long-lasting construction, low startup voltage, reverse connection protection, high accuracy and stability, and a wide range of applications. Specifications include measuring range DC0.00-30.0V, power supply range 4-30V, limit input DC30.0V, and allowable error ±1%. The device has a refresh rate of about 300mS once, display mode of three-digit 0.36 LED digital, and working temperature of -10℃ - 65℃.