I have the Invisible Fence system for my dog Max. It emits a frequency that triggers a receiver on his collar to give him a shock if he ventures past it and out of the yard. Works great. System went down over the weekend, the control module in the garage beeps when it senses a break in the line. Well, long story short, I couldn't find the break, had to call in the service guy. $100 later and the system is repaired. My wife said he had some kind of wand that made noise while he walked around the perimeter and stopped when he hit the break spot. Anyone have any ideas on what he was using and if I can get one or a variation of one to use for myself?
