You will receive: an ultrasonic dog whistle, a lanyard and a training ratchet, a valuable set for dog training. Material: The Whistle is made of stainless steel and plastic, safe material and fine workmanship, never rust or fade, and create safe frequencies for dogs. Ultrasonic Training Whistle: Our dog whistle can train the dog to create auditory memory and learn commands and skills. Easily train your dog to obey and perform many commands, such as : B. sit down, lie down, stop barking, go potty training, etc. Ease of Use: The soundboard has an elastic spiral telephone line, and the other end is a key ring to prevent loss. The lanyard can also prevent the hoses from getting lost. It is convenient to keep your hands free to interact with the dog during exercise. Safety for Dogs: Even if you use the training dog whistle for a long time, our dog whistle will not harm your dog. It won’t be a stress response, but it will be more obedient and will obey you. You Don’t have to worry about