SSSCAT cat training aid has two components: a patented motion detector device and a can of harmless, non-toxic spray. Each time your cat approaches the restricted area, the detector senses his movement and releases a brisk spray. The cat gets startled by the spray action and vacates the area. You can adjust angles between detection and spray directions according to the expected action of the device. You can also adjust the direction of spray up or down. SSSCAT can also be used in outdoor areas where cats or other small animals can be destructive or where they may get injured.