Adjustable frequency The precision of the whistle allows you to obtain a finer frequency range, barely audible for humans but very good for dogs. The frequency lock maintains the set frequency so the tone your dog gets used to does not vary. Wh Ultrasonic Training Whistle Our dog whistle stops so Reliable barking and helps with learning commands and tricks. Suitable for sports, hunting, herding, guide dogs and rescue dogs. The dog is man's best friend. We will strengthen the relationship between you and your four-legged friend. Dog Whistle with Lanyard High quality lanyard prevents losing the dog whistle. Thanks to the included carabiner, the whistle can be removed from the wrist strap at any time. Our high-end whistle combines lightness and comfort. Command is command The dog can clearly distinguish the ultrasonic waves emitted by its flute and the owner can use it to blow different sounds and give instructions . We will strengthen the relationship between you and your four-legged friend. Good friends of humanity Dogs can understand us, but they don't comment. We can train the dog to do some basic movements to improve the relationship between person and dog. With this whistle you can easily train your dog. Product information Product name: ultrasonic dog flute. Specifications: total length (including the iron ring on the head) 9CM, flute length 8CM After the lanyard is folded, the length is 42cm and the width is 1 .5 cm. Material: Stainless steel Weight: approximately 25 g/piece with cord Color: Black Quantity delivered : 3 rooms hear it. How to use: Step 1: Loosen the sonic adjustment screw. Step 2: Turn the adjustment lever while blowing air into the #39;air inlet to adjust the optimal tilt. Step 3: After turning the adjustment lever, tighten the sound adjustment screw What do you get? Dog whistle with whistle * 3