Track up to 20 dogs at a time, with ranges up to 14,5 km using a Garmin T 5 collar device or up to 6,5 km with T 5 mini collar device 2.5-second update rate provides faster location tracking when dogs are on the run GPS/GLONASS reception enables better satellite tracking in challenging environments than GPS alone Comes with preloaded Recreational map of Europe and a free 1-year BirdsEye Satellite Imagery subscription; compatible with Garmin HuntView cards Hunt Metrics data helps analyze your dogs’ hunting patterns and behaviors; view distance traveled, time afield and more