The lights work in low light conditions and at night, and are visible for up to 100 yards away.

Rugged and water resistant to 30 feet, this tracking-only dog device is tough enough to run wherever your dog runs, up to 9 miles away.  T5 unites, when sold separately, ship with a 1-inch blue collar strap. 

Unit demensions (WxHxD):  3.5" x 1.75" x 1.85"

Weight:  6.6 oz for transmitter and antenna 9.3 oz total weight

Battery life: 48 hours +

Battery type: Rechargeable lithium-ion pack; user replaceable

Interface: USB

Water rating: 30 feet

High-sensitivity GPS receiver, GPS antenna: top, orange

LED beacon lights & Rescue Mode

Collar width 1"