The Beaphar calming collar for dogs is a stress and anxiety-reducing product that releases a synthetic copy of a dog's natural appeasing pheromone, which helps promote feelings of reassurance and calm. It is designed to help with issues like excessive barking, destructive behavior, and anxiety during stressful situations such as fireworks, thunderstorms, or travel. The collar lasts for about 4 weeks and is suitable for all breeds and ages, though some users report it does not work for their dogs.