When the Outdoor Bark Control is within range of a barking dog, an internal microphone picks up the sound and the unit is automatically activated. The PetSafe® Outdoor Bark Control emits an ultrasonic sound. The ultrasonic sound can be heard by dogs but is silent to humans. Startled by the high-pitched sound that is safe and effective, the dog should stop barking, as it will associate its bark with this unpleasant noise. When the dog stops barking the ultrasonic sound also stops. The PetSafe® Outdoor Bark Control has 3 range levels and a test mode. It is effective up to 15 metres. Key Features For outdoor use only For dogs 3.6 kg and up Range up to 15 metres Ultrasonic sound only your dog can hear Microphone detects bark Durable and weatherproof Uses 1 x 9 Volt battery (not included) Battery usually lasts 2 months Good/low battery indicator Two Colour LED: Shows good or low battery System Includes PetSafe® Outdoor Bark Control Operating Guide 1 x 9 Volt Battery (not included)
