A short burst of air and warning sound are activated by a motion sensor, keeping your pets from causing harm or getting hurt The Mini Scarecrow safely and humanely protects your covered porch or patio, potted plants, or countertops A motion sensor activates a warning sound and a brief, harmless spray of compressed air to keep your pet away Sensor detects motion up to 1 meter away and activates spray Adjustable detection angle and spray angle Once your pet learns to recognize the warning sound, you can switch to, sound only mode to conserve compressed air Each can holds over 200 sprays The motion sensor and spray are separately adjustable so they can be positioned precisely