Description: Electro-chromatic. Provides automatic progressive dimming of the inside mirror- reducing the glare caused by the headlights of vehicles in the rear view. The auto-dimming function can be manually deselected by pushing a switch on the inside mirror. Improves nighttime driving safety. Reduces eye-strain and driver fatigue. Relieves glare that can lead to temporary night blindness- increased average stopping distances and slowed reaction time.