Photo 1 of NPS Alpha Ultrasonic Dog Barking Control Device | 50FT w/Triple Sonic Sensors | Professional Anti Bark Device for Dogs & Dog Bark Deterrent | Dog Whistle to Stop Barking | Rechargeable Dog Silencer

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Photo 1 of NPS Alpha Ultrasonic Dog Barking Control Device | 50FT w/Triple Sonic Sensors | Professional Anti Bark Device for Dogs & Dog Bark Deterrent | Dog Whistle to Stop Barking | Rechargeable Dog Silencer