Features:3.5 diameter, with black face, smoked lens & 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. The gauge dial & the needle pointer provide high visibility. When the RPMs are exceeded, the warning LED blinks/lights up & the warning buzzer sounds. Peak memory function: the maximum RPM during driving can be stored & checked later. The gauge is clinched by using the exclusive mounting band & back base.