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