Smarter Pet Premium Dog Whistle to Stop Barking with Lanyard and Anti-loss Cover | Safest Pet Training, Obedience, and Repellent Aid | Easy to Use | 100% GUARANTEED TO STOP BARKING AND HELP DOGS BECOME MORE OBEDIENT - Our dog whistle is the best and most versatile whistle available! Quickly train your dog to stop barking and follow simple commands. Also works on your neighbor's dogs! TWO ANTI-LOSS FEATURES (NEVER LOSE ANOTHER WHISTLE AGAIN!) - Our whistle contains two layers of protection: A special lock nut, and a protective tight-grip snap cover. Our anti-loss snap cover shields the whistle from any outside movement or contact that can inadvertantly unscrew the whistle. It has a tight, firm grip that will hold your whistle in place and never come loose! Other cheaper whistles ONLY have a lock nut, which is not enough protection for regular use. EASY TO USE AND COMPACT IN SIZE - Simply adjust the frequency rod until you find the frequency your dog best responds to, then use the locking nut to lock in that frequency. Finally, place the anti-loss snap cover on top and you are good to go! Our whistle is compact, high quality, and lightweight, making it incredibly efficient and convenient. KEEP YOUR OPTIMUM DESIRED FREQUENCY - Most dog whistles can easily lose preferred frequencies after getting bumped and coming slightly unscrewed. This results in having to constantly readjust the frequency which can get old VERY fast! Our whistle's dual anti-loss feature ensures this will never happen again! PREMIUM LANYARD AND 100% MONEY BACK GUARANTEE INCLUDED - Included with every whistle is a custom branded Smarter Pet lanyard that looks and feels great to wear while training your dog. We are so confident you will enjoy your whistle, we have backed it with a no hassle 100% money back guarantee! If you aren't completely satisfied with your whistle, just contact us and return it, and we will refund the FULL amount (we can also replace the whistle if there is an issue, at no cost to you).