I have a 7 month old black lab. He's the best puppy I could ever ask for, but when he's outside he typically starts sniffing and forgets about me, his name, and all of the commands we've mastered in the house. After associating the chime as a warning tone, he quickly learned when I say "come" I mean it. The chime is a great wake-up to get him out of his "smelling daze" and back to reality. Distance, battery life, and remote are all of exceptional quality. The collar isn't as slim as the picture represents, but it's irrelevant because this product works great!