Product Name: Tachometer gauge Voltage: 12V Diameter: 52mm Indicating Range: 0-6000 RPM (On dash) Length: 585mm/23in Light Color: White Fitment: for 1-20 Cylinder Wire Installation: Yellow Wire(+): 12V dash lighting Green Wire: Connector Oxygen sensor (Not Include) Red Wire: 12V Terminal on Ignition Switch (Or other Power Source) Black Wire (-): Grounded Interior Gauge. No vibration when driving. Bright White LED illumination for night driving. The Product arrived with wires to connect the gauge to your car. The Clock designed With black Faceplate and Clear lens.. Tachometer gauge for Clock Gauge with White LED color. Please note that this gauge is for interior usage and not water proof. Fitment: For Motor Engine Attention: Although instruction is included.Professional Installation Is Highly Recommended! Color: Black Material: plastic Package Contents: 1 * Backlight Tacho Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.