Accurately Detect Your Dogs’ Barking --- Casfuy anti bark collar is engineered with the most advanced sonic detection technology which activates only when YOUR dog barks(1000-2000kHZ,80-90db),solved all the problem of no triggering and false triggering caused by other dogs’ barking, shaking head or other sounds. Intelligent Training Modes --- The no bark collar features dual working modes (beep+ vibration, beep+ vibration + harmless static shock ), 1-5 adjustable sensitivity level adjustable, 5th level is the most sensitive. Select the most suitable mode and level freely as your needs. And the newest version bark collar use one-touch to switch setting, very easy to operate. Safe and Effective --- Your pet’s safety is our #1 priority. Our dog bark collar has 7 training steps with progressive correction, the last step is an automatic protection mode to deactivate the collar, after two minute it will back to work. Your dog can wear it safely even if you are not at home. IP67 Waterproof and Rechargeable --- 100% waterproof dog barking collar is great for indoor and outdoor use. Each collar contains a built-in large capacity USB rechargeable battery, 2-3 hour of charge time gives you 14-20 days of using. And there is a battery indicator on the collar let you know battery status faster. Almost applies to all sizes dogs --- This bark control collar feature 5 levels and adjustable webbing 8-24 inch, whether you’re the parent of a small, medium or large dog. High-quality strap with reflective stripes, which is responsible for increasing your dog's safety and visibility. You can’t go wrong with this fully customizable and flexible collar.