Nice, durable, easy to use light up dog collar. This collar has been like night and day when it comes to my beloved French Bulldog on our night. Because French Bulldogs overheat easily, we have taken to doing night walks because it is cooler here in Texas. This collar worked so well that a jogger that was passing us by said "nice collar, I saw your dog's collar flashing from way up the street." So, this collar has enhanced our safety. It was easy to set it up also. I wrapped it around my dog's neck for a quick measurement, cut the excess, pushed the two ends together and off we went. The collar was pre-charged right out of th box. Also worth mentioning is the thickness of the collar. It is nice and thick and there is no way this thing will break easily. Love it.