3.5Inch Diameter Car Tachometer RPM Gauge 0-11000 RPM with 7 Colors Backlight Features: 3.5" diameter, with black face, smoked lens and super bright LED background light. 0-11,000 RPM measurement, shift light RPM is adjustable. The stepping motor is sufficient for quick response of all sorts of professional motor sports. The gauge dial is invisible while the ignition switch is off. Once the ignition switch is turned on, a clear display appears by colored LED illumination. Provide high precision in the accuracy of information generated. Adjustable color, choose the color of backlights according to personal preference. 7 colors are available. Specifications: Color: Black Light Color: Dark Blue/Yellow/Pink/Light Blue/Green/Red/Clear, 7 Colors with one gauge Material: ABS Gauge Display: LED Shift light: Green First and then turn Red Measurement Range: 0~11,000 RPM Powered By: 12V Switch Unit Length: Approx. 5cm / 2" Indicator Size: 7.62 * 3cm / 3 * 1.2in (L * W) Diameter: Approx. 88mm / 3.5" Package Size: 21.5 * 15.5 * 12.5cm / 8.46 * 6.1 * 4.92in (L * W * H) Package Weight: 668.5g / 23.56oz Package List: 1* 80MM Tachometer Gauge 1* Shift Light 1* Mounting Bracket 1* Meter Cup 1* Installation Manual Note: About the problem of adjusting the pointer to zero：First, turn on the meter, wait for the pointer to go to the middle position, then turn off the power and turn it on again, the pointer will go to zero automatically.