AMPERE METER.

It shows how many amps are going into or out of your vehicles battery. (up to 60 amps in and/or out of your battery)

 It is 6, 12, or 24 volt for use in almost all cars, trucks, buses, boats, stationary engines, etc.

It fits into a 52mm (2 inch) hole with a plastic holder so it doesn't short out to earth like the ones with a metal bracket.

It has a built in dash light for night time illumination.