Features:<br />    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～<br />    A plastic sleeve protects the adjustment area<br />    Great for recall over long distances<br />    Key ring loop included<br /><br />    Specification:<br />    Material: Metal &amp; Plastic<br />    Length: 90mm<br /><br />Package Contents:<br />    1 x Dog Training Whistle