Pet Dog Obedience Quiet Training Ultrasonic Dog Whistle

Specifications Color: Black Material: Metal & Plastic Length: 80 mm Diameter: 0.8 cm supersonic Please be aware of this fact they are not totally silent. Overview This Dog Training Whistle is designed for dog training. The frequency produced isn'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. Illustrate： Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Please refer to the actual product for accuracy. The measurement allowed error is +/- 1-3 cm and +/- 10 g.