The Garmin Astro 430 is the new generation Garmin GPS and GLONASS tracking system for sporting dogs. It can track up to 20 dogs at a range of up to 9 miles. With a 2.5 second update rate that is twice as fast as its predecessor. So, it is quicker to pinpoint the location when dogs are on the run. Intuitive and easy to use, the Astro 430 features a vibrant 2.6 inch display, preloaded TOPO 100k mapping and an optional in-unit rechargeable battery. Also includes Hunt Metrics dog performance data to help analyze your dog's tracking patterns and behaviors, so you can train more effectively.