The Fuel Bridge wires in between your fuel level gauge and sending unit and allows you to use any AutoMeter fuel level gauge with any stock or aftermarket sending unit. The triple push button with LED display allows for easy set up. This unit is a compact size at 3 1/8" wide x 2 1/2" tall x 3/4" thick. A low fuel level warning is available at 10% and off at 15%. It can turn on an LED or relay.