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For instance, the locator not only gives you the location and direction but also tells you how fast your freewheeling canine is prancing about town. The black box affixed to the collar uses Advanced Global Position System (A GPS) which combines satellites and cellular networks. With a rugged strap wrap, it is lightweight at 2.5 ounces and is built to take on the elements and a dog’s propensity to shake, wiggle, and roll.It comes with three items in the box: the locator box (which has a Velcro fastening strap so it can be taken off the collar); the battery charger; and an AKC collar tag (which has your dog’s private identification number).The AKC CAR has over four million pets enrolled (for the duration of their lives) in their database.