SSSCat is an automated spray system that combines Multivet's spray technology and a motion detector to protect indoor areas and objects from pet within a radius of 3 feet. How it Works: The device detects a pet's movement as it approaches an off-limit zone, then releases a brisk harmless spray. The pet will automatically turn away. Once the pet makes the association with the spray, he will stay away. Requires 4 AA batteries (not included).