The Pet Corrector helps stop: Barking, Chasing, Stealing, Jumping Up, Place Avoidance and other unwanted behaviours. It works by emitting a hiss of compressed gas to interrupt a dogs unwanted behaviour. The overall effect is to grab the attention of a dog. It is used and recommended by trainers and behaviourists throughout the world and over 3.5 million have been sold to date. It is recommended that you read the user guide (supplied free with this product) prior to use. The Pet Corrector comes in 3 sizes: 30ml, 50ml, 200ml and a holster for the 50ml size. The Pet Corrector can help with: Barking, Chasing, Stealing, Jumping Up, House Manners or other unwanted behaviours It works by emitting a hiss of compressed gas, designed to gain the dog’s attention to interrupt the unwanted behaviour, and once distracted a positive command or reward can be inserted It is used and recommended by trainers and behaviourists throughout the world. It is extremely effective and over 4 million have been sold to date Pet Corrector should always be used responsibly, never sprayed directly into an animals face and is not recommended for use with young puppies Included in the pack is a comprehensive free training guide, featuring tips and easy to follow instructions to ensure effective and responsible use