The NEW Fault Finder is a combined voltmeter and current meter, designed specifically for rapidly locating problems on an electric fence by following current flow both visually & audbily. Features include: Large black-lit display, bold current indicator arrows, Simultaneous voltage & current reading, Robust, Impact & Water resistant case, Low battery indicator & replaceable 9V battery. Can be used on all electric wire fences, no earth lead required. This fault finder also has automatic polarity detection. Works well with the Speedrite, Patriot & Taylor fence chargers.