Dog whistle made of metal, very useful to recall your friend thanks to ultrasounds. The whistle is composed of two parts, equipped with a useful cap to close it when not used. The metal chain fixed to the rings at the ends ensures the cap to the whistle, thus avoiding to loose it once opened to use it. The dog whistle PA 6509 has adjustable frequency, a useful accessory you could carry with you during your everyday walks with your dog or when training your puppy.