A Citronella Bark Collar & Citronella Dog Training Collar is a very effective and humane way to train your dog. When using the Citronella Bark Collar, the dog activates a light mist of citronella to be released in front of his nose. Dogs don't like this spray & quickly learn not to bark in order to avoid the spray. The Citronella Remote Training Collar is used to teach your dog basic obedience. You are in control though, when you press the button on the remote, Citronella is than released in front of the dogs noise. Thus teaching your dog, when you give a command he needs to listen to avoid the mist of citronella in front of his noise.