BMHNOONE Adjustable Ultrasonic Silent Dog Whistle for Barking and Recall Training 1 Pack

• Amazon now offers the BMHNOONE Adjustable Frequency Ultrasonic Silent Dog Whistle, now priced at $8.99 (list price $9.99).
• Prime members get free two-day shipping, and regular members get free shipping on orders over $35 within the contiguous U.S.
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Editor's Pick: Take your dog to the park or a farm, and no matter how loud you shout from far away, it won't come back. At that moment, one blow of the whistle can pull its attention back to you. There is an adjustment screw on the side; every dog reacts differently to frequency, so just twist it to the position where its ears perk up. Made of 304 stainless steel, it handles being gnawed and swung around by your dog and keeps working after getting rained on and wiped dry. No batteries and no charging needed—hang it around your neck and use it on the go; the small size takes up little space in a pocket, too.