Are you tired of your dogs excessive barking? Do you want a safe and effective solution to reduce nuisance barking without harming them? Look no further than The Ultrasonic Anti Barking Dog Device Our device uses advanced technology to emit high-frequency sound waves that are inaudible to humans but effective at controlling barking in dogs of all breeds and sizes. Not only is our device safe for your dog, but its also completely humane and painless.It is non-toxic, tasteless and does not cause any impact on people and household pets. It is used to prevent attacks from dogs and send out ultrasound to drive away dogs or wild wolves. This product has stable performance and quick results, and can effectively repel dogs and wild wolves 20 meters away. TWO SOUND SETTINGS The Ultrasonic Anti Barking Dog Device comes with two settings. Setting 1 is for training purposes and is designed to get the attention of your dog to help you train your dog. The second setting engages the more aggressive ultrasonic emitter. Setting 2 is designed to emit a louder ultrasonic sound which should be used only in an outdoor setting. Product parameters Style: Single black/Single yellow/Double head black Shell material:ABS Colour: Black/Yellow Size: 13.7*5.5cm/5.4*2.28inch Power supply: 1 * 9V battery (not included) Application: Dog Quantity: 1 Double size Single size NOTE: