Best Dog Whistle for Training to Stop Barking-Teach to be Silent, Sit, Stay- Adjustable to Lock Frequency-ADDED BONUS-EBOOK-How to Train your Dog With Whistle-#1 Complete Training System on the Market DOG WHISTLE TO STOP BARKING-Distract your dog from their barking spree and distract them from whatever is causing the barking or other unwanted behavior. Dog whistles are a perfect training tool to teach keep quiet. Professional dog trainers agree it's still the most effective way of communicating with there dogs. SOLID COMPACT DESIGN-Silver constructed with high quality copper material,perfect small compact design. It can be easily added to your keychain, wallet or in your pockets. Always on hand for you to use, built to last no rubbers or plastic in the whistle. ULTIMATE TRAINING TOOL-Dog Whistles have been used over a 100 years, still the most effective tool for training. Use the dog whistle with changing orders. One long burst can mean ULTRA SONIC SOUND WAVES-Emits frequency that your dog can hear from far distances to recall. Just adjust the pitch and blow the whistle to your dog. Wait until he is asleep and gently blow on the whistle. Continue to test the whistle until your dogs ears perk up, your Pet Essential whistle has a nut and screw that you can adjust and lock the frequency. PET ESSENTIAL DIFFERENCE-Your special gift, all orders include a indispensable e-book,"How to Train 'Man's Best Friend'" Training Your Dog to Verbal and Whistle Commands ."This guide arrives via email 24 hours after shipping and includes tips, information, and support materials to help you train your dog. From basic commands like sit, stay, and come or to use the dog whistle to stop barking. We pride ourselves on delivering a complete package.