This head wearing magnifying glass with lights, can help improve reading quality by multiple ways, suitable for daily reading, sewing, repair, printing, detecting for unclear image, antiques or crafts collector, industry or technical worker or more Head mount design, free your hands to reading, inspection or repair 20mm Acrylic optical Lens offer8X 15X 23X Multiple Magnification visual experience Can directly worn on the head for convenience, or remove the lenses for easy carrying You use it for reading geography or others, hobby observation, identification collectibles crafts coins stamps Material: Acrylic optical lens, ABS plastic, metal fittings Magnification:8X 15X 23X Large lens diameter: 20mm Product Dimensions:85 155 55mm(folded) Tare: 140g Package: 1 lamp head magnifier with hand free Feature: head wearing lamp magnifier, LED , hands free, Detachable Adjustable Lenses, Retractable Eyeglasses Foot Support, lightweight, portable Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures Please allow slight dimension difference due to different manual measurementbAdjustable LED light for image quality b: you can adjust the spiral button outside the corner of the eye, will improve image quality in dim condition. There include 6 LR1130 batteries, once used up, you can press the button and reverse to open the battery cover, replace 3 old batteries with new ones, then it will work normally. bRetractable eyeglasses foot support b: you can adjust eyeglass foot into a comfortable length and fix it, easy to wear, it's quite convenient for reading or repair. bComfortable nasal bridge b: non-slip, adjustable nasal bridge, can support the head magnifying glass well, not easy to slip off. bAdjustable multiple magnification b: If wear the magnifier with removing the extra lens barrel, it will offer 8 magnification power. About the lens barrel, it can be used as 15X pocket magnifier. If you align the lens barrel with the groove of the bracket and tight them up, that will offer 23X magnification power. Please kindly note the larger the magnification, the closer the object distance is. bIdeal hand free magnifier with lights b: designed to head wearing magnifier, like magnifying eyeglasses, allow your hands free to any reading, inspection or repair, perfect for antique loupe, watch or electronic repair.