The best headband magnifier we've ever offered. Magnification adjusts from 1.8X to 4.8X. Lenses flip down or up in succession, quickly changing the magnification as your work demands. Flip-down loupe provides additional magnification for detail work. Twin beam lights for pinpoint illumination. Adjusts to any head size, and can be worn comfortably over glasses. Requires four AAA batteries (not included).