With digital display, intuitive observation. Accurate and stable parameter display, low power consumption. Simple installation, stable performance, anti vibration, anti shock. Smoke lens during the day,clear and bright LED Display during the night. 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. Only fit for 4 / 6/ 8 Cylinder Gasoline Car. : Item Type:Car Auto Tachometer Condition : 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.