Adjustable ultrasonic anti-bark collar for dogs

The PetSafe® ultrasonic bark control effectively deters a dog from barking when it is wearing the collar. When the microphone detects your dog's barking, the device emits an ultrasonic sound, inaudible to most humans but which dogs can hear. Surprised by this high-pitched signal, the dog should stop barking, associating barking with this unpleasant noise. The nylon collar is adjustable for neck sizes up to 71 cm. The case is waterproof and runs on 2 x 3-volt lithium batteries with an average life of 1 to 3 months. The on/off switch extends battery life. System for dogs over 3.6 kg.