Canine Innovations Pet Convincer 2 - Air Training Tool Dogs The Pet Convincer employs a unique mixture of acoustic sound inaudible to humans and air The Safe, Humane & Easy Training Device - No Shocking, choking, or chemicals. Permanently corrects dog's behavior - use when you catch your dog performing a bad habit. Uses replaceable CO2 cartridges - each one lasts around 25 bursts of air - 2 cartridges are included Corrects: Excessive Barking, Aggression, Stealing, Digging, Jumping, Whining, Chasing, and much more