Garmin Alpha Accessories Part Number 010-01041-70
The T5 dog device with collar is a top-mounted, high-sensitivity GPS/GLONASS receiver that uses LED beacon lights activated from the Astro® 320 and Alpha® 100. 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. T 5 units, when sold separately, ship with a 1-inch blue collar strap. Replacement straps are available in multiple colors (sold separately).