"The Genuine ACME No. 211.5 ALPHA Dog Whistle, made from BPA-free plastic, delivers 110 dBA at a frequency of 5400Hz, making it perfect for long-range training of larger dogs. Preferred by Labrador, Retriever, Collie, Greyhound and larger breeds. Offers a longer range than the 210.5, approximately 450-500 yards. Developed over four years in collaboration with World Champion trainers to create an unrivalled whistle. Patented sound chambers offer a more efficient use of air. That means brighter sound giving you better command and a more responsive dog, close- to and over distance. These all-new designs are effortless to blow and, because of that, give you the greatest flexibility to vary your breath, your whistling style and your choice of commands. The all over comfort grip offers softness in the mouth and perfect handling in all conditions. Over the fields and hills, on the beach, in your local park or at home this new range will ensure you lead your pack. NEW FEATURES: Enhanced performance and control of your commands. The Comfort Grip add stability in the hand in all weather conditions. Easier to blow due to a reduction in air loss, allowing for quieter sounding more responsive commands. Made in the UK using the most technologically advanced materials and production methods to create a World leading product. DEVELOPED OVER FOUR YEARS: In collaboration with World Champion trainers to create an unrivalled whistle. Patented sound chambers offer a more efficient use of air. That means brighter sound giving you better command and a more responsive dog, close- to and over distance. Available in a wide variety of colors. Choose a different color whistle for your partner, family members, dog walker, or even to match an outfit for a special occasion knowing that your dog will respond to the whistle, whoever is blowing it! Made from BPA-free plastic to food-grade standards. Includes ACME 104 Swivel Hook Lanyard/Cord in a complimenting color. Ensure whistle is clean and dry before storage. Clean with warm water. Store out of direct sunlight.