The Pet Corrector emits a hiss of compressed gas which mimics the sound of predators to interrupt undesirable behaviours such as jumping up, stealing, chasing and barking. The inert gas is safe, has no smell and works on most animals including dogs, cats and horses. A detailed training guide is included, with helpful training tips and key dos and don'ts. The Pet Corrector Holster holds one 50ml can and can be attached to a pocket or belt for quick access. This product is designed to stop barking and other unwanted behaviors like jumping up, food stealing, aggression, biting, chewing, and furniture avoidance. It offers simple and easy-to-use, instant results. Pet Corrector works by emitting a harmless hiss of air, mimicking natural warning sounds, to interrupt actions and allow for retraining. It's a constructive and positive way to interrupt bad habits and retrain better behaviors at home and in public. The process involves witnessing the unwanted behavior, spraying the Pet Corrector (away from the dog) to distract, and then giving the dog a command and reward. Please note: Not suitable for puppies or anxious dogs. Always read instructions before use. Approx uses per can: 30ml = 30 uses, 50ml = 50 uses, 200ml = 200 uses. Use only in short bursts.