Dog Training Whistle Set - Sturdy Steel Key Ring - Multi-Color 4 Pack - Teach Skills & Control Your Dogs to Stop Barking - Lifetime Guarantee Pack of 4 Audible Pet Behavior Training Whistles. Train small and large dogs for different commands and teach automatic behaviour. Can be used for agility training and learning to navigate equipment. NOT a silent whistle. Enjoy maximum control with a more obedient and skillful dog. Sturdy pipe design holds together firmly. Top quality dog supplies. For any level dog trainer, learn how to train your dog like a pro. Dont waste money on cheap devices that constantly need replacements. Whistle will alert dogs or can be used as a bark deterrent, stopper or repellent. Train more positively and gently in a more natural way without the need for a harsh and aggressive remote shock training collar, silencer or clicker. No need for repellent spray or ultrasonic repeller. Train dogs to come to you, prevent biting, hunt, stop barking, play games or do tricks. Comfortable on human ears. Train any type of dog breeds for obedience including Pit bulls, Labrador Retriever, German Shepherds, Yorkshire Terriers, Dachshunds, Beagles, Boxers Shih Tzu, and more. Train your dog comfortably for as long as you want. Detachable Key Ring. Attach your dog whistles to lanyards, toys, accessories, string, collars, chains and necklaces. Great for runners, dog trainers and sport coaches. Carry it with you whenever you want.