Ideal for training pet dogs, police dogs, and sheepdogs. Item Type Ultrasonic Dog Barking Trainer & Deterrent. 2 × Ultrasonic Anti Dog Barking Trainer Devices. Safe & Humane Deterrent : Harmless to dogs and inaudible to human ears; perfect for preventing aggressive dog attacks during jogging, walking, cycling, or night patrols.Note: Do not aim at human ears.
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