The Speedrite Fault Finder quickly and easily locates faults along the fence line and has a large back lit display. Displays current, voltage and current direction simultaneously. Audible current indicator, convenient belt clip. It is inside a rugged water resistant case. It has a replaceable 9-volt battery and also includes a low battery warning system. Can be used with all energizers. Can be used on all electric wire fences. Speedrite Digital Fault Finder is an easy-to-use hand-held voltmeter and current meter for quickly finding faults in your fence-line. Features a large back-lit display which shows current, current direction, and voltage all at the same time with an audible current indicator. Displays previous current reading to compare values. Features an insulated, rugged, and water-resistant case with belt clip. Powered by 9V battery.