Garmin Alpha 300 Series Dog Tracking and Training Device with 3.5" Touchscreen DisplayLead your pack with the Alpha 300 Series dog tracking and training handheld. Track and train up to 20 dogs from up to 9 miles when paired with your compatible dog collars. See it all on a vivid 3. 5 touchscreen display with up to a 2. 5 second update rate. Easily control training functions using the button operated design, which gives you 18 levels of stimulation, tone or vibration when paired to your training enabled collar. Access premium Garmin