THE ACME 211.5 Dog Training Whistle produces a medium high pitch, single note, preferred by Labrador and Retriever trainers; good distance whistle. Available in a wide variety of colours. - THE ACME 211.5 Dog Whistle is a great all-rounder, producing a high pitch that is quiet to the user - Preferred by Labrador and Retriever owners but an excellent all-round dog whistle for close and distance control - Single frequency. This whistle is recommended for both use in town and the countryside. - Genuine ACME Whistle - Made by J Hudson & Co, whistle specialists with over 150 years of experience - Made in the UK Storage Instructions: Ensure whistle is clean and dry before storage. Store out of direct sunlight. Care Instructions: Always ensure whistle is clean and free from dirt. Clean with warm water mixed with a small amount of disinfectant. Dry thoroughly with a clean lint free cloth.