Teach your puppy to be on their best behaviour with this essential dog training whistle. This high-quality dog accessory is made of Chrome Plated brass. It measures 5.5cm and is 12g ideal to hang on your key ring to have by your side at all time. . Colour: Chrome Silver Material: Chrome Plated Brass Length: 5.5cm (approx.) Key ring loop included 2 Whistles With Every Order Note: The dog whistle is in 2 parts. Part 1: Ultrasonic. Inaudible to the Human Ear, but very audible to the dog. Part 2: Audible Element, this can be heard by the Human Ear, which helps the owner to distinguish long and/or short whistles to train their dog. Adjustable pitch - simply tighten or loosen the screw to work out your dogs frequency It should be noted that this whistle is audible to the human ear, essential for gauging its efficiency. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store