Anti Bark Collar with 2 Modes - Safety 2 humanized working modes, will not cause harm to your dog. when a bark is detected, it beeps or beeps and vibrates. The anti-bark collar will continue to work to progress to the next level of correction until the dog stops barking. Depending on your pet's nature and behavior, choose the trigger sensitivity from 1 to 7 by the power button to prevent the dog from barking. Smart Anti Bark Device - Intelligent anti-jamming, which can effectively and safely filter out other unrelated sounds and prevent false triggering. Only your dog's barking can trigger the Bark Control Collar. You can test by blowing or shouting into the sensor microphone on the back of the receiver. Anti-Bark Collar Security Adjustable Sensitivity - This anti bark collar for dogs offers 7 levels of sensitivity for all possible barking volumes and for different environments, allowing you to set the right level of sensitivity for your ferret. Level #7 is the most sensitive setting.