The best dog whistles in the world! Developed over four years in collaboration with 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.