Works on 4, 6, and 8 cylinder engines Only could be used on 12V gasoline vehicles Measurement Range: 0~8000RPM Power: 12V DC Backlight: White LED Shift Light: Red colour: Black Material: ABS size: 3.75inch Package Contents: 1 x Tachometer Gauge 1 x Installation Kits 1 x User 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.