Helps easily locate wire breaks within your in-ground fence system. Temporarily replace your transmitter then trace your fence configuration. Audible tones help discover each side of a broken wire. Locates complete breaks only; partial breaks will not be detected by the system. Radio mounts to an extendable pole so it can comfortably be held close to the ground. Frequency: below 620kHz when possible. Adjust the tuning dial to a location where no radio stations are broadcasting and the output of the radio receiver is producing a static noise. Works up to 10 acres. (It may work beyond 10 acres, but the tone will get weak and inaudible).