2X Dog Whistle Professional Dog Training Whistle Adjustable Whistle with Lanyard 【Stop Dog Barking】: When your dog or neighbor's dog keeps barking, gently blow the dog whistle, the ultrasonic frequency emitted by the dog whistle can easily attract the dog's attention and stop barking. 【Adjusable Frequencies】: Different dogs respond to different frequencies. Our dog training whistle has a nut and screw that would adjust the frequency when turned. Notice your dog's reaction to each setting until your dog exhibits the strongest reaction. 【Absolutely Safe】: The dog whistles is made of metal. Ultrasound frequencies attract the attention of dogs without damaging their hearing and without any health problems. 【Remote Command】: Ultrasound can travel up to 1000 meters. After training, even if the dog is not in your field of vision, the dog can make corresponding actions (Sit, Paw, Lay Down, Up, Heal) according to your whistle. At any time use dog whistle to make dogs come to you, no need to shout. 【Suitable for All Dogs】: Silent dog whistle suitable for all dog breeds including (Labrador, Scottish, Golden Retriever, German Shepherd, Beagle). You can get in touch with your dog anytime. Prepare some treats, lead your dog to a lawn, or somewhere quiet. Adjust the pitch and blow the whistle to train your dog, continue testing until your dog responds. Notice your dog's reaction to each setting until your dog exhibits the strongest reaction. It is best to train 5-6 times per session, reward your dog with a treat If it responds positively. For example : When teaching the sit-down action, first play the flute according to the prescribed method, then hold the dog's buttock with your hand and let him sit down. In this way, repeat the training. Later, when the flute is played, the dog will sit down by himself.