X-Hire, In good condition. This spray remote dog training collar interrupts your dogs behaviour for a moment, bring his attention back to the dog owner and makes him ready for a different activity. The dog is surprised by this new element (the noise, the cold sensation and the sight and smell of the cloud) and becomes receptive to your training commands again. This is the chance to start playing a game with him or to divert him to some other (permitted) activity. Once the dog is behaving well, you should reward him enthusiastically with food or praise. The MasterPlus is a proven training method that has many success stories, the 300 metre range helps to train dogs out of livestock chasing, eating things that can only described as undesirable and simple recall when all other training attempts have failed.