100% 30-Day Money-Back Guarantee: Our dog whistle features adjustable frequencies and a frequency lock to help stop barking and assist in training. It includes a 49cm lanyard and cover. If you're not fully satisfied, return it for a full refund no questions asked.Dog Whistle Stops Barking, Teaches Recall and Tricks: This dog whistle is designed to help stop barking and support training. With multiple frequencies, it offers improved results for dogs of all ages.Adjustable Frequency + Frequency Lock: The whistle provides a wide range of frequencies thanks to precision design, and includes a frequency lock to maintain your dog's ideal setting.Eco-Friendly Dog Whistle: Made with quality and environmental care in mind, this whistle is designed to be safe and long-lasting. Try it today and see the difference, or return within 30 days for a full refund.