Docooler Automotive Car 3.5 Inches 0-11000 RPM Tachometer Gauge Kit Blue LED 3.5" diameter, with black face, smoked lens and super bright LED background light. 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. The gauge dial and the needle pointer provide high visibility. When the RPMs are exceeded, the warning LED blinks/lights up and the warning buzzer sounds. 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. Peak memory function: the maximum RPM during driving can be stored and checked later.The gauge is clinched by using the exclusive mounting band and back base.