TriTonics Dog Bark Collars will create stimulation when he/she barks creating a mild discomfort. Through continued use your dog will learn not to bark. Tri-Tronics Dog Bark Collars are tried and true devices which will most assuredly have your dog better behaved quickly and easily. Made from high quality and durable materials Tri-Tronics Dog Bark Collars are constructed to last for a very long time.