STOP UNWANTED BEHAVIOR OF DOGS, TRY TO CORRECT AND GUIDE THEM! But nobody wants to yell at their best friend, and that doesnt work anyway. Luckily now theres a way to speak their language and tell them tostop barking, in a way theyll understand. Introducing The Hypersonic Bark Buster Dog Training Device, which has been designed to emit a harmless high-pitched noise that only dogs can hear. These types of hypersonic sounds have been used for decades to train dogs effectively and with zero harm. Now, thisawesomely simple technologyhas been transformed into a neat device that allows you to control the frequency with an easy turn of the button. With the ability to reach a single dog within up to 15 meters, simply place The Hypersonic Bark Busternear where your dog likes to bark and wait for the magic to occur.After your dog stops barking, the ultrasonic barking control will automatically stop emitting sounds. The Hypersonic Bark Buster Dog Training Devicecan automatically detect dog barks 50 feet away. The barking control device automatically emits high sounds that only dogs can hear. After the dog stops barking, the ultrasonic barking control will automatically stop emitting ultrasound. NOTES: 1. The sound wave frequency range heard by normal adults is 20HZ-20KHZ, and the sound wave frequency range of dogs is 15HZ-120KHZ. Can cause hearing damage to dogs. 2. Automatic ultrasonic bark arrester, only suitable for quiet and indoor use. 3. Pay attention to staying away from places where there is interference from sound sources. 4. This product is only suitable for single dog use. ââââDaniel Seltzer