The diameter is 60 mm x 45 mm depth. Each gauge comes with a V-shaped bracket in the kit. The speedos feature odometer, trip 1 + 2, voltmeter and clock on the LED display, 2 reset buttons on the back of the housing, selectable Km/h or mph scale. The Tachos displays temperature (°C or °F), max RPM, max Temperature, hourmeter and clock. Maximum RPM range is 20000, maximum rpm is memorized for recall on the LCD field.