Perfect and Optimized Magnifier - Our head mount magnifier is designed to improve customer needs, upgrade USB charging design for more comfortable use. 4 Extended Magnification Lenses and ultra-high - Interchangeable lens design with 1.5X, 2.5X, 3.5X, 5X magnification. 5H grade scratch resistant weight reduction lenses, more wear resistant and durable. Perfect various work and daily life. Ergonomics Glasses bracket design - Glasses design headband magnifier - Proper glasses frame for a more secure fit, effectively prevent falling. Adjustable LED Lighting - The hands-free reading magnifier glasses have 2 ultra-bright energy-saving LED lights. Adjustable illumination angle for precise illumination of object surface. Multi-function magnifier - This lightweight magnifier is ideal for close-up work in jewelry, electrician, watch repair , crafts, beauty, painting or general reading aids, and the elderly. 4 kinds of focal length: 330mm, 200mm, 142mm, 100mm. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the light and display difference , there will be some color difference, depending on the physical object received.