Item Type: Dog Whistle_x000D_ Material: Metal_x000D_ Length: Approx. 7.7cm / 2.8in 1Ultrasonic Frequency: By adjusting different ultrasonic frequencies, you can easily teach your dog unlimited commands such as sit, come, stop barking, stay. 2Stop Barking: Dog whistle to stop barking can quickly stop your dog from barking and help you teach your dog obedience and learn basic skills. 3Pitch Adjustment: You can adjust the pitch to get the right frequency by blowing air in through the inlet while loosening the sound adjustment screw and turning the lever to adjust to the optimal pitch. 4Prevent Getting Lost: Professional dog whistle tracking can prevent your dog from getting lost and your pet can hear the dog whistle from 200 meters away even if they can't see you. 5With Lanyard: The Silent dog whistle comes with a lanyard that allows you to take the whistle anywhere without worrying about losing it.3 x_x000D_ _x000D_ DogWhistle