Material: Stainless Steel Size: 8cm Packet Length: 3 Stop Barking: When Your Dog Or A Neighbor's Dog Barks Incessantly, Gently Blow The Dog Whistle Dog Whistle. The Ultrasonic Frequency It Emits Easily Attracts Your Dog's Attention And Stops The Barking. High-Quality Materials: The Dog Whistle Is Made Of 304 Stainless Steel. The Ultrasonic Frequency Attracts Your Dog's Attention Without Damaging Their Hearing Or Causing Any Health Problems. Professional-Grade Dog Training And Recall Tool: The Dog Whistle Precise Whistle Tone Accelerates Obedience Training Results. It's Ideal For Recall Commands, Agility Training, And Correcting Behavioral Issues Like Jumping Or Digging. Adjustable Ultrasonic Frequency: With An Adjustable Ultrasonic Frequency Of 16khz-45khz, The Dog Whistle Easily Trains Your Dog To Stop Excessive Barking. It's Designed To Humanely Deter Unwanted Behavior Without Harming Pets Or Neighbors. Suitable For All Dog Breeds And Sizes: Whether You Have A Small Beagle Or A Large German Shepherd, This Dog Whistle Is Suitable For All Breeds. It's The Perfect Tool For Training, Recalling, And Communicating Anytime, Anywhere.