The StayAway automatic pet deterrent uses a passive infrared sensor to detect an animal within its one-meter zone, and responds with a warning sound and a brief, harmless spray of compressed air. To set up the StayAway, simply place the unit in the area you want to protect, (for example kitchen counters, potted plants, etc.). Turn on the sound/spray, and wait a few seconds for the motion detector to stabilize. The StayAway is now set to go. For the first few days, use the combined sound/spray mode. When the motion detector detects a cat's movement, it will first respond with a sound, followed by the spray of air. After a few encounters with the StayAway, most cats will decide that the sound is enough to warn them from off-limit areas.