Helps drivers avoid hitting objects or pedestrians when backing out of the garage or driveway; Helps drivers see oncoming traffic when exiting from parking garages, parking lots and alleys; Ideal for watching over aisles in retail stores, view front doors and entryways in office buildings; 12 in. in diameter; Easy to install with included mounting bracket; Lightweight and break-resistant; Built-in visor reduces glare from overhead lights; 90-day limited warranty;