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, Alpha® 100 and Alpha 200i. 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).