The PetSafe Ultrasonic Bark Control effectively deters barking when it’s 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 the unpleasant noise.

Features

• For dogs over 3.6kg
• Water resistant 
• Fits neck sizes up to 71cm
• Low battery indicator
• On/Off switch

System Includes:

• Bark control unit
• Adjustable nylon collar
• Two 3-volt lithium CR2032 batteries
• Operating guide