Tachometer

A Tachometer (also called a revolution against "Tash", tachometer, fuel gauge or RPM) is an instrument that measures the speed of rotation of a shaft or disk, as in an engine or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analog dial, but digital displays are increasingly common.

Automotive lighting

The lighting system consists of a motor vehicle lighting and signaling devices mounted or integrated into the front, side, rear, and in some cases, the top of the vehicle. The purpose of this system is to provide illumination for the driver to operate the vehicle safely at night, to increase the visibility of the vehicle and to display information about the presence of vehicle, position, size, direction of travel, and the driver's intentions regarding the direction and speed of travel.