Features:LED super white display£¬easy to see the digits.?Used to measure the air/fuel ratio of automobile.Add a racing look and feel to your ride， high quality and light weight.High accuracy and easy operation.Easy Installation， then you can use it conveniently.Specifications:Color: White + Black Mirror SurfaceMaterial: ABSLight Source: LED White DisplayPower: DC(10-15V) 12V ProfessionalGauge Diameter: 52mm / 2"?Gauge Length: 7.3cm / 2.87inGauge Wire Length: Approx. 60cm / 23.62inGauge Weight: 142g / 5ozPackage Weight: 267g / 9.41ozPackage Size: 16.5 * 12.3 * 7.8cm / 6.5 * 4.84 * 3.07in (L * W * H)Package List:1 * Air/Fuel Ratio Gauge1 * User Manual(English)