StayAway Automatic Pet Deterrent warn your pets away from trouble with a high-pitched alarm and a startling burst of air. The StayAway automatic pet deterrent safely and humanely protects your porch, patio, potted plants, and countertops. Just place it in the area you want to protect, and the StayAway pet deterrent does the rest. When a cat approaches, the StayAway responds with a warning sound and a brief, harmless spray of compressed air to warn your pet away. Once your cat learns to recognize the warning sound, you can switch to “sound only” mode to conserve compressed air for an even more economical solution. Safely keeps cats away from protected areas Detects motion up to three feet (one meter) away Combines sound with compressed air for a harmless, odorless deterrent Operates up to 200 times on a single, replaceable canister of compressed air