Duck, I have ten coyote hounds. Live in southern Illinois and I have the Garmin Alpha 100 and 8 of the tt10 tracking/training collars. They are just super. Used the old fashioned 'beep-beep' tracking collars for years and the new technology is just fabulous. GPS at its finest. Do not know what breed of hunting dog you plan on using the Alpha 100 unit on but I guarantee that it will work and will work good......distance up to 5 miles if you are not in the Rocky Mountains. Fairly expensive but worth every penny when all information is sorted and figured out. plenty of dealers and the parent company offers fast turn around time if repairs are required. I certainly recommend the Garmin Alpha and the tt10 collars.....the newer tt15 collars are perhaps a tad better than the 10's as the 15's are this years latest big thing. send me a private letter and I will send you back more info. The training part of the Alpha is wide ranged, very easy to operate, and powerful. Sincerely, Cow Tag