1. More sensitive than general instruments, which can display the data accurately.2. The lighting on the dial makes it easy to read in the dark and brings much convenience .3. An instrument with 7 colors can adapt to the needs of more environments, and it is very convenient to switch colors by buttons.4. Can add the look and feel of a racing car to your riding, with high quality and light weight.5. After exquisite craftsmanship and professional processing, this car tachometer has good performance and can well meet your needs.Item Type:Car TachometerUnit:Revolutions Per MinuteDisplay Range:0-11000 RPMDial Dimater:. 80 mm / 3.15inAccessories:Suitable for Most 1-8 (1,2,3,4,5,6,7,8) Cylinder 12V Gasoline VehiclesPower Supply:DC(10-15V) 12V ProfessionalHow to Use:Wiring:Red wiringpositiveBlack wiringnegativeRed + white wiringlight source lineGreen wiringsignal lineYellow wiringsignal lineColor:As ShownMaterial:ABS+MetalPackage Contents:1 * Car Tachometer1 * Alarm Lamp1 * Gasket2 * Double-Sided Tape1 * Rubber Pad2 * Screw2 * Meter Cover2 * Bracket1 * Shift Button1 * electric wire1 * English instruction manualOnly 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.