Product descriptionSize: 2 Inch or 52mmColor: BlackUnit Type: BARPower:Professional 12V,IGN MAX 0.3Display Range: -1.0~+3.0 barDigital Accurately: Every 0.1 barLED 20 PCS:Yellow x 6 OCS (-1.0~0 BAR);Green x 7 PCS (0.2~1.4 BAR);Red x 7 PCS (1.6~3.0 BAR)Additional features:starting power, the operating voltage can be displayed, and at five minute intervals display primary voltage.The gauge will both show the digital and analog LEDPackage includes:1 x Boost Vacuum Gauge1xBoost Sensor1x1 X PVC Hose(6 Feet)1xT-Fitting1xWire1xEnglish Manual