See also:

Speedometer
The speedometer shows the vehicle's speed in either kilometers per hour (km/h) or miles per hour (mph). ...

Tachometer
The tachometer displays the engine speed in revolutions per minute (rpm). ...

Driving with the Blind Spot Mirror
Actual Mirror View 1. When the approaching vehicle is a long distance away, the image in the main mirror is small and near the inboard edge of the mirror. 2. As the vehicle gets closer, the imag ...