Genuine ACME Shepherds lip, in mouth, Dog Training Whistle No. 575/576 Preferred by shepherds, and companions of working dogs all over the world. For Sheep Trails and Herding. Considered the ultimate tool for in-tune communication with your dog. This professional model allows the dog trainer to create a crescendo of sound in a wide variety of frequencies.

Variable Frequency: As an in mouth whistle, the only limitation in sound is based on wind pressure and the shape of ones mouth when creating air pressure, reaching up to 100 dBA. Made for both the working person and the working dog, it fosters a harmonious relationship between owner and companion. Instructions:

• Place whistle in mouth with the curved open edge facing outwards resting on your tongue.
• Hold in the mouth in such a way as to create a gap underneath the whistle. The back of the whistle will sit on the back of the tongue.
• Blow and by varying the blow, you will create different sounds.
• To create an even wider range of sounds, move the tongue up and down reducing and widening the gap underneath the whistle. N.B. if you place your tongue against the lower hole, you will silence the whistle. It doesnt matter which way up the whistle is placed. This whistle does require a few practice blows before you get a sound, but once one sound is achieved, it is plain sailing or whistling. Available in BPA Free Plastic to food grade standards in a variety of colours, Nickel Silver, Silver Plated, Gold Plated or Rose Gold Plated. Product: Weight Metal 0.026Lb / 12g, Plastic 0.009lb / 4g Height 0.197 inches / 0.50cm. Width 1.457 inches / 3.70cm. Length 1.890 inches / 4.80cm. Pealess/Ball Free Dog Training Whistle Care: Ensure whistle is clean and dry before storage. Clean with warm water. Store out of direct sunlight. Genuine ACME Whistle made in the UK by specialists with over 150 years of experience. Check out THE ACME store for more.