High accuracy and easy operation. Easy Installation, then you can use it conveniently. Only fit for 4 / 6/ 8 Cylinder Gasoline Car. : Item Type:Car Auto Tachometer Condition : new Product name :tachometer gauge Voltage : 12V Length : 75mm/2.95in Diameter : 57mm/2.24in Meansure Range: 0~8000RPM Feature : LED super bright display. Comes with installtion manual . Fitment : Universal Car 2inch/52mm diameter Tachometer Gauge (The compatibility just for reference .Please make sure the item fit for your car before purchase.) Wire connection : Black : negative Red : positive Green : signal line Colour: black + white Material: plastic + metal Package Contents: 1 * tachometer gauge 1 * manual Only the above package content, other products are not included. Note: Light 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. Accurate and stable parameter display, low power consumption. Simple installation, stable performance, anti vibration, anti shock. Add a racing look and feel to your ride,High quality and light weight. Smoke lens during the day,clear and bright LED Display during the night. With digital display, intuitive observation.