Outdoor Bark Control ,Ultrasonic Bark Control,outdoor guard,ultrasonic sound guard Outdoor Bark Control ,Ultrasonic Bark Control,outdoor guard,ultrasonic sound guard SY-200Dog Dazer/Torch/Personal Siren Ideal to protect joggers, walkers, postal and delivery personnel against hostile dogs and aggressive attacksDog dazer: By transmitting an uncomfortable but non-harmful high-frequency sound, will ...