(Tru-Test) Dual function tool used to check electic fence voltages and locate fence line faults. Hand-held unit allows you to quickly move down your fence line, comparing voltage and current readings as you go, to locate short circuits and faults on your fence. A significant change in current ampere readings between one point and the next indicates the presence of a fault between these two points. Unit can be used with or without sound setting, which rises in pitch with the magnitude of the current pulse. Does not require an earth leader.