TNT-01R Universal Electronic Speedometer/Tachometer - Black Face/Casing Multiplication gauge is the complement for all street use, Gauges include: speedometer, tachometer, odometer, voltmeter and clock, Speed is displayed digitally; RPM via analog gauge, Stepper motor allows for a faster and smoother response and more accurate information, Indicator lights in multiple colors allow for easy recognition, Measure 3* dia. without bezel; 3.4* with bezel x 1.75* D (without bezel)