This is a PetSafe Ultrasonic Dog Bark Collar Pet Safe (PBC17-14036). The PetSafe Ultrasonic Bark Control collar will help to deter barking when it is worn. When the microphone picks up the sound of your dog’s bark, the unit emits an ultrasonic tone that can be heard by your dog, but is silent to most humans. Startled by the high-pitched tone, the dog should stop barking, as it will associate its bark with this unpleasant noise. Results will vary depending on how your dog will react to the ultrasonic noise produced.
