[Training] After tuning the dear pet to a frequency, stick to it. Dogs can understand us, but they cannot express themselves. You can easily train your dog with this whistle. [A good friend of humanity] With this dog whistle, your dog will receive clear signals and commands. Clear communication between you and your dog will be much easier. We will strengthen the relationship between you and your four-legged friends. [Adjustable frequency] The precise cutting of the dog whistle achieves a finer frequency range, almost inaudible to humans, but very important for dogs. With the best and most reliable professional dog whistle on the market, it can be an ideal companion in almost any situation. [Dog Whistle] High quality dog whistle. It can be used with a rope and with the attached carabiner you can remove the whistle from the neck strap at any time. Our high-quality dog whistle combines light weight, comfort of use and powerful performance. The risk of loss is also minimized. [Ultrasonic training whistle] Our dog whistle can reliably stop barking and help you learn commands and techniques. Suitable for sports, hunting, herding, guide dogs and rescue dogs. Color: Black Size: 0.9*8.0cm Quantity delivered: 2 pieces The product size is measured by hand, there are some errors, and the actual product shall prevail. The color of the product is affected by the shooting light and there is slight color difference, which depends on the actual product received.