The Garmin Alpha 100 is the leading Multi-dog track and train touch screen GPS system. Get the best out of your hunt with the combination of Garmin’s GPS tracking and Tri-Tronics training technologies in the Alpha 100 handheld & TT15 or TT15 Mini collar. With the GLONASS GPS receiver of the Alpha & TT15 combo, tracking to follow and retrieve your dog has never been better. Whether you have one dog or anywhere up to 20 dogs, the track and train features in the Alpha bundles make it easy to follow your dog’s speed, distance, and direction. This system offers several different tone, shock and vibration modes for training and correcting behavior in the field.