Works on 4, 6 and 8 cylinder engines Only could be used on 12V gasoline vehicles Measuring range: 0 ~ 8000 / min Power: 12V DC Backlight: White LED Shift Light: Red Color: Black Material: ABS Size: 3.75 inch Package Contents: 2 x Tachometer Gauge 2 x Installation Kits 2 x User Manual Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.