• Avoid hitting objects or pedestrians when backing out of the garage or driveway. • See oncoming traffic when exiting from parking garages, parking lots, and alleys. • Keep watch over aisles in retail stores. • View front doors and entryways from your desk in office buildings. • 12 inch (30 cm) diameter. • Easy installation with included mounting bracket. • Lightweight and break-resistant. • Built-in visor reduces glare from overhead lights.