Strengthening lenses( H5) with 5 magnifications(1.0X,1.5X,2.0X,2.5X,3.5X) can be used in any combination of 2 to meet your various needs,and well packed in a stable case for easy carry and long time storage. You can put this head mount magnifier on your head like a pair of glasses.It Can adjust the head circumference arbitrarily,regardless of the elderly and children can adjust. This headband magnifier glasses has a very light weigh so that you would not feel any burdened or uncomfortable. The individual lenses /magnifying lenses can be easily assembled and dismantled.Perfect headset magnifier for close up work like dentists,electricians,jewelers,sewing,crafts,beauty,painting and the elderly. Wide range of uses: You can use a portable magnifier to read books,insects,plants,jewelry,crafts,children's hobby observation,etc The frame can be flipped to adjust the angle of the lens and the tightness of the frame upside down. The movable head magnifier lens slot can adjust the distance between your eyes and lens for different needs.