I managed to find an underground brake cable for my robotic lawnmower (not too deep, but I'm sure it will work with a deep underground cable). in less than 2 minutes.! Easy to use with no drama or confusion! I have never used a wire finder. The audio is quite loud and stops at pause (no confusion). I tried to solve this problem with AM Radio but for me it was a waste of time and frustration. For the price I would recommend having this boundary wire tool as it lasts until you get it installed by a professional tuber which isn't cheap. Thanks to Amazon I went to HD to find a broken wire tool but they couldn't even recommend a product in store for me!