The fault finder will locate an earthing problem on a fence line. When holding the finder on the fence line, it will give a voltage reading, the severity of the fault on a scale from 1-9 and the direction of the fault is also provided. The hand held unit has a cushioned plastic housing that gives added protection but also makes it comfortable to carry. It comes with batteries installed that have a 4 year battery life. With replacement batteries available and the units robust design it fault finder will be a once in a lifetime purchase. Can be used with all types of wires and tapes. Compatible with battery and mains fencers.