Quick Overview This item is whistle made of stainless steel for training pet dog. Dogs can hear this whistle up to 3 km away, subject to weather conditions. Product Description Features: * Name of item:Whistle * Matrtial:Stainless steel * Precision manufactured construction * Sturdy and strong for long lifetime * Dogs can hear this whistle up to 3 km away, subject to weather conditions * Can be locked to one pitch, or adjusted across the full range * Handy split ring for attaching to keyring or lanyard * Weight:0.013kg/0.46ounce * Size:5.8cm/2.28inch for whole length Package included: 1* Whistle