Garmin TT15X collarThe Most Powerful of All Garmin GPS Collars! Track and train your hunting dogs with the new version of Garmin TT15X GPS Collar, the most powerful among all Garmin GPS collars! This tracking and training collar for hunting dogs, compatible with Alpha 100, Alpha 200, and Alpha 10 remote controls, features a high sensitivity GPS GLONASS receiver allowing you to track your dog with great precision, up to 9 miles [14. 50 kilometers] away, even in dense