Best-in-class dog training system with simple GPS tracking One-handed, no-look dog training for up to 3 dogs (additional dog devices sold separately) and at-a-glance tracking with a range of more than 2 miles 2.5-second update rate provides faster location tracking when your dogs are on the run Customize training for each dog with 18 levels of continuous and momentary stimulation, tone and vibration settings At-a-glance directional tracking on the built-in display with GPS and GLONASS satellite reception shows which direction and how far away your dogs are Easy pairing and setup with TT 15 dog devices for training and tracking or T 5 dog devices for tracking only