Interrupts unwanted behavior, You control the timing of the correction. Animals are deterred by the sound. Works with compressed air. The Pet Corrector emits a blast of compressed air, ideal for interrupting undesirable behaviors. Many animals use a 'hiss' sound to ward off predators and the Pet Corrector mimics this sound creating a natural deterrent. Ensure that you reward your dog immediately once the behavior has ceased. You control the blast so you know the timing of your corrections will always be right. A free training guide is included with helpful tips and key do's and don'ts. It is important that the Pet Corrector is used cautiously and responsibly, so as not to traumatize or frighten your dog. Typical uses include: Unwanted barking, Jumping up, Stealing food, Place avoidance, Aggression. This product is labeled ORM-D and therefore can only be shipped via Ground within the continental U.S. and Canada.