PetSafe SSSCAT Unscented Replacement TWO (2) Cans Refill - PPD17-16165 The motion-activated spray safely and automatically keeps pets away from rooms, furniture, and areas in your home. Turn on the spray and wait a few seconds for the motion sensor to stabilize itself. The PetSafe SSSCat Refill Spray is for the SSScat Spray Deterrent. Each refill can is 4.5 ounces and has 80-100 sprays. Set it on the counter to keep your cat from jumping up, or place it in the doorway to the living room to keep your dog out of the room and off the couch. It's easy to train your dog or cat to stay out of certain areas. When your pet comes near the SSSCAT unit, he'll feel a quick burst of harmless but startling spray. The spray reminds your pet to stay away.