This Dog Training Whistle is designed for dog training, the frequency produced isn&#39;t of effect on person, but very useful for dogs, it will sit up, come here, eat, sit down etc. Great for recall over long distances Please be aware of this fact they are not totally silent. Material: Metal Length: approx 7CM Diameter:0.8cm
Note: Due to the light and screen setting difference, the item&#39;s color may be slightly different from the pictures. Please allow little size error due to manual measurement.