No Bark Dog Collar

The sonic, bark-control collar emits a safe, high frequency tone when yourdog barks. This sonic wave, that only your dog can hear, is not harmful orpainful. Distinguishes between annoyance and rapid, intruder-alert barking.3/4 thick nylon adjustable collar fits necks up to 21. Requires one 9-Vbattery (not included). -The Safe, Effective Way to Hush Howling Hounds!; Get more information and prices for No Bark Dog Collar , from Health and Gifts.

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