Description:Display Dimension: 40.5mm x 24mm x 17.5mm Installation Dimension : 37.5mm x 21mm Display: Four 0.36" LED digital tube Display Color: Red Overload: 4 Times range Refresh Rate: About 300mS Power Supply: DC 7-30V Measuring Range: DC 0-33V Accuracy: 0.02V Input Impedance: Appox.100Kohm Operating Temperature: -40℃ - 85℃ Package Includes:1x 4-Digit LED Voltmeter