A top-mounted, high-sensitivity GPS/GLONASS receiver, T 5 mini dog device uses LED beacon lights activated from its compatible handheld device. The lights work in low-light conditions and at night, and are visible up to 100 yards away. Rugged and water-resistant to 10 meters, the tracking-only dog device with collar is tough enough to run wherever your dog runs, up to 4 miles away. T 5 mini ships with a 3/4-inch blue collar strap. It also comes with 18.5" standard antenna, charging cable, AC adapter, and vehicle power cable.