Anti Bark Collar with 2 Modes- Safety 2 humanized working modes, will not cause harm to your dog. when barking is detected, it will beep or beep and vibrate. The anti bark collar will bark will continue to work to pass to the next level of correction until the dog stops barking. Depending on the nature and behavior of your pet, choose the trigger sensitivity from 1 to 7 by the power button to prevent the dog from barking. Intelligent Anti Barking Device- An intelligent anti-jamming device, which can effectively and safely filter out other unrelated sounds and prevent false triggering. Only your dog's barking can trigger the collar anti-barking. You can test by blowing or shouting into the sensor microphone on the back of the receiver. Adjustable Sensitivity Safety Bark Collar- This dog bark collar provides 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. You can adjust the sensitivity level using the +/- buttons to get the effect you want. Default level 4 on power-up. Rechargeable and Waterproof Anti Bark Collar- The anti bark collar includes a built-in USB rechargeable battery. It can be fully charged in around 2-3 hours and will give you 15 days of use. IP67 waterproof design and suitable for summer dog swimming and showering. If you have any questions, do not hesitate to contact us via the order form. Adjustable No Bark Collar for Small/Medium/Large Dogs- This vibrating dog collar is for dogs with a neck circumference between 22-55CM and is suitable for small, medium and large dogs of all sizes. breeds; dogs weighing more than 5-50 kg and older than 6 months can use this vibrating collar; Durable reflective nylon collar - You can adjust the strap according to your dog's size.