You can buy here: http://www.dogsilencerproguide.com/buy <br /> <br />BarkWise is a training device, and as with any training method, results may take anywhere from a couple days to a few weeks. This will depend on how quickly your dog takes to the training. <br /> <br />The collar is adjustable between 6 to 24 inches and the electronic unit is ergonomically designed to fit the contours of your dog's neck. It only weighs 2.2 ounces so it won't weigh your dog down. <br /> <br />If you need more reviews, I recommend you to read this article: http://dogbarkhelp.com/barkwise-best-vibration-bark-control-collar-reviews/
