Magnified and Optimized - Our head mount magnifier is designed to improve customer needs, upgrade USB charging design for more comfortable use. 4 Extended and Ultra Magnification Lenses -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 - Suitable glasses frame for a more secure fit, effectively prevent falling. Adjustable LED Light - 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.