Bird-B-Gone, Inc. offers the Repeller, a solar powered unit that uses continuous motion to prevent large birds from landing. Rotating rods mounted on top of the unit sweep birds off of streetlights, balconies, boats, AC units and more. The two adjustable "arms" cover up to 5 feet in diameter by turning continuously at 30 rpms. A solar panel powers a heavy duty, brushless motor which stores energy. It is a humane way to effectively deter large bird species. Ideal in high visibility areas, it can be mounted on flat or angled surfaces. For more information, call (800) 392-6915 or visit www.birdbgone.com.