Anti-barking Petsafe hut for dogs, works by ultrasound

The barking control system for outdoor or indoor use emits ultrasound. Dogs can hear them, but humans can't. Surprised by this high-pitched sound, the dog should stop barking, as it will associate the barking with this unpleasant noise. When the dog stops barking, the ultrasound will also stop. The PetSafe Anti-barking System has a test mode and three sensitivity levels. It is effective up to 15 meters. Technical details: Prevents your dog from barking. Designed to be hung on a tree, mounted on a pole or on indoor furniture. Safe and effective device for dogs of all breeds and sizes. 4 modes of operation. 3 sensitivity levels. Range: 15 meters. Durable and weather resistant. Operates with a 9-volt battery.