The fuel bridge connects between your fuel level indicator and the sending unit, allowing you to use any AutoMeter fuel level gauge with any stock or aftermarket shipping unit. The triple push button with LED indicator allows for easy setup. This unit has a compact size of 3 1/2" wide x 2 1/2" high x 3/4" thick. A low fuel warning is pending at 10% and 15%. Can turn on an LED or relay.