The T 9 dog device with collar is a top-mounted,
high-sensitivity GPS/GLONASS receiver that uses LED beacon lights
activated from the Astro 900. The lights work in low
light conditions and at night, and are visible for up to 100 yards away.
Rugged and water resistant to 10 meters,
this tracking-only dog device is tough enough to run wherever your dog
runs, up to 9 miles away. ***Update for all Alpha Handhelds and Astro 320/430/900 Handhelds.