PetSafe Ultrasonic Bark Control

The Petsafe Ultrasonic Bark Control Collar is designed for use with small dogs, emitting a harmless but effective ultrasonic tone to control excessive barking. Microphone activated, this unit deters barking via a harmless, high pitched tone that is inaudible to humans. This collar is suitable for dogs weighing over 3.6kgs with a maximum collar size of 71cm.