【Anti-bark collar with 2 modes】- Two safe, user-friendly operating modes that will not harm your dog. When barking is detected, the pet will beep or chirp and vibrate. The anti-bark collar will work to the next correction level until the dog stops barking. Depending on your pet's temperament and behavior, select the trigger sensitivity from 1 to 7 via the power button to stop your dog from barking. 【Intelligent anti-bark device】- Intelligent anti-interference can effectively and safely filter out other unrelated sounds and prevent false triggers. Only your dog's barking can activate the anti-bark collar. You can test it by blowing or shouting into the sensor microphone on the back of the receiver. 【Safety Bark Collar with Adjustable Sensitivity】- This dog collar offers 7 sensitivity levels to accommodate all 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 sensitivity