Smart Dog Bark Control Device This bark collar no longer has false triggering. Smart Detection Design can detect dog’s barking on particular frequency and decibel, filter out other unrelated sounds. Growling, shaking, scratching or barking from other dogs will not trigger necklace. The dog bark collar is only triggered by your dog’s bark. Human Free Bark Collar with 2 ModesOur dog bark collar works in automatic mode, in which the Sound and Vibration modes are combined to effectively and safely stop dog barking. This helps your dog understand that barking is undesirable when it vibrates and beeps. Useful when you are away from home and your dog is left alone. Adjustable Sensitivity This bark stop dog collar has 2 “+ - " buttons used to adjust the appropriate sensitivity from 1 to 7 levels according to the size of the dog. The higher the sensitivity level, the easier it is to trigger the collar. level 4 is the most sensitive setting. Rechargeable and waterproof bark-free collar This