"AMAZING BARK CONTROL - The high frequency dog training whistle is a useful tool to control excessive dog barking. Dog whistles are very popular for training your dog without hurting your pet by shocks and other means. Its ultrasonic sound is effective in stopping barking and also harmless to dogs. When you whistle your dog, your dog would stop barking immediately after training. ADJUSTABLE PITCH - An adjustable pitch whistle is a great way to teach your dog new commands. Dogs can't hear all frequencies, but the ultrasonic dog whistle is adjustable to precisely set the appropriate frequency for your dog to respond. The sound won't annoy you and who's around you, it's ultra sonic sound which is well suited for dogs. EASY TRAINING - Take control of your dog: train your dog to follow instructions, to sit, come, stop barking, stay and more. Impact on discipline and personally control your dog by emitting sequences that only he understands, regardless of age, gender or breed. Enjoy complete training freedom with Poodles, Border Collies, Sheep, Hounds, German Shepherds, Bulldogs, Terriers, Rottweilers, Dachshunds, Huskies, Hunters ANTI-LOST AND SAFE DOG WHISTLE - New dual anti-lost features with special locking nut and cover with free lanyard. Never worry about the dog whistle being lost or misplaced, bring it to wherever you want. Our dog whistle designed reasonable small size and made of premium stainless steel, convenient to have and long service life. The whistle sound is not as clear for humans but is enough for the dog. " Note: The data are all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending the physical object received Delivery Quantity: (according to the main image)