The SportDOG Brand® No Bark 10 levels Collar is simple-to-use technology that helps you train your dog when it’s appropriate to bark and when it’s not. Simply turn the collar on and place it on your dog – with ten levels of correction the Silent Partner™ bark-detection technology will start working immediately. Once your dog barks there are two modes of operation: Progressive correction and user select correction, for a bark that can't be tamed.