Feature:1. 52mm/2in Universal type, with measuring range of 010000RPM, which is made to meet your needs.2. Use a stepping motor to improve sensitivity, and the numbers and pointers are clearly displayed on the dial, which is easy to read in the dark.3. Easy to install, use English user manual, it is strongly recommended that most cars or motorcycles use professional installation.4. With simple wiring, black connects to negative, red connects to positive, green connects to signal line.5. Safe plastic material, not easy to damage your car and can avoid unnecessary losses.Specification:Item Type: TachometerMaterial: PlasticApplication: Fit For 4 6 8 cylinders speedometerSpecification: Diameter: Approx. 52mm/2inIndicating Range: 0-10000 RPMHousing Color: SilverVoltage: 12VWire Connection: Black-negativeRed-positiveGreen-signal line.Package List:1 x Instrument 1 x Power Cord1 x Manual