SAFETY FIRST: Pet Corrector is not recommended for use with Puppies and should never be pointed directly at a dog, nor any part near your body. Pet Corrector is not a toy and should be used only by adults and professionals. USES PER CAN: Pet Corrector can be sprayed or used in general correlation to the can size. For 30ml cans, Pet Corrector has enough air to be used about 30 times. Pet Corrector is best used in short bursts. GREAT FOR DOG TRAINING: We love our dogs so training them humanely is important. Pet Corrector is a constructive & positive way to interrupt bad habits & retrain better behaviours for peace of mind around the house & in public. HISS SOUND: Pet Corrector retrains dog behaviours by emitting a hiss sound mimicking natural warning sounds that cats & other animals make. This interrupts actions and allow you to retrain habits like jumping up & barking. STOPS BARKING: Help train your dog to stop excessive barking with Pet Corrector. Pet Corrector works by emitting a harmless hiss of air to interrupt barking & help you train "no bark" & other useful training commands.