Bird-X Balcony Gard - 6.75in x 5.5in x 3.5in x -WhiteThe Balcony Gard is a safe, effective, humane repeller for birds that Invade your property. It creates an ultrasonic sound wave that repels these birds without chemicals, traps, or poisons while still being silent to most humans. Set it to continuous use or motion activated mode and keep pest birds away. Protect cars, property, and landscaping from corrosive bird dropping damage!