♥️【ACCURATE BARK DETECTION】The 2018 Petfere bark control collar is engineered with the most advanced sonic detection technology. It’s able to identify your dogs’ barking more accurately without false triggering caused by other pets barking, shaking their head, or environmental sounds. 7 adjustable sensitive level can be customized for any breed of dogs. ♥️【IP67 WATERPROOF】This 100% waterproof no bark collar is great for indoor and outdoor use and features a built-in, large capacity USB rechargeable battery that charges in as little as 2-3 hours while providing 14-20 days of continual use. There’s also a low battery indicator on bark collars for medium dogs ♥️【SAFE & NO MORE ACCIDENTAL SHOCKS】Safety is our #1 priority! Your dog will never be accidentally shocked with our collar. Two working mode for your option: regular and protective safe mode. We specially designed the protective safe mode which can block the static shock to safely protect your dogs.(Note:The no shock mode is safely protect your dogs via gentle vibrations. If no shock mode can not effectively stop your aggressive barking dog, please switch to shock mode.) ♥️【ADJUSTABLE & RECHARGEABLE】Whether your dog is a medium or a large one, you can adjust bark collars to fit for your dog.This barking collar for dogs includes Lithium-Polymer batteries that charge for 2-3 hours and last more than 1 week. ♥️【100% SERVICE AND GUARANTEED】We are happy to provide full satisfaction with our bark collar large dog. And offer 1 year warranty! Buy it with confidence!