Jack 5 out of 5 04.21.2016 at 9:37 pm I purchased the Garmin/Tritronics Pro 70 first. I was totally unsatisfied with it! I realize we have some hilly terrain in WV. But this thing would not reach approximately 500 yards (maximum) behind one house, on a slope. I returned it. It was virtually worthless…unless you wanted to train a dog on chasing cars! Then purchased the Pro Trashbreaker. It reaches as far as 2 miles, in WV terrain. Have not actually used it with a dog as of yet. But, have checked to make sure it actually has a useful range for hunting dogs. I would buy the Pro Trashbreaker again! Outdoor Dog Supply is very nice to deal with! Excellent service! Quick to respond!