Feature:1. Adjustable Pitch: The pitch of this dog whistle can be easily adjusted to get right frequency, loosen the sonic adjustment screw while blowing the air in from the air inlet, turn the adjustment lever to adjust to the pitch.2. Dog Training: Each time you use different flute methods to specify the commands, you can easily teach your dog unlimited commands by adjusting the different frequencies.3. High Safety: This silent dog whistle won't damage your dog's hearing during training and will not cause any health problems for your dog.4. No Barking: This dog training whistle can quickly make dogs stop barking and help you teach your dog obedience and learn basic skills, like sit, paw, lay down, up.5. Designed with Lanyard: This stop barking whistle is designed with lanyard. The dog whistle is made of strong and durable metal material. Your pet can hear the whistle up to 200 meters / 218yd away even if they can't see you.Specification:Item Type: Dog WhistleMaterial: MetalLength: Approx. 7.7cm / 3.0in ( Manual Measurement, Slight Error May Exist ).Package List:2 xDog Whistle1 x Clicker