2X Dog Whistle Professional Dog Training Whistle Adjustable Whistle with Lanyard When your dog or neighbor's dog keeps barking, gently blow the dog whistle. The ultrasonic frequency emitted can easily attract the dog's attention and stop barking. Different dogs respond to different frequencies. Our dog training whistle has a nut and screw to adjust the frequency when turned. Notice your dog's reaction to each setting until it exhibits the strongest response. Made of metal, the ultrasound frequencies attract dogs' attention without damaging their hearing or causing health issues. Ultrasound can travel up to 1000 meters. After training, even if the dog is out of your sight, it can perform corresponding actions (Sit, Paw, Lay Down, Up, Heal) according to your whistle. Call your dog to come anytime without shouting. Silent dog whistle suitable for all dog breeds including Labrador, Scottish, Golden Retriever, German Shepherd, Beagle. Stay connected with your dog anytime. Prepare some treats and lead your dog to a lawn or quiet place. Adjust the pitch and blow the whistle to train, continuing testing until your dog responds. Notice your dog's reaction to each setting until it exhibits the strongest response. Train 5-6 times per session and reward with a treat for positive responses. For example, when teaching sit-down, blow the whistle as prescribed, then gently hold the dog's buttock to make it sit. Repeat training, and later the dog will sit by itself when it hears the whistle.