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 Objectives 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 holder design - Glasses design headband magnifier - Suitable glasses frame for more secure fit, effectively prevent falling. Adjustable LED Lighting - The hands-free reading magnifier glasses feature 2 ultra-bright, energy-saving LED lights. Adjustable illumination angle for precise illumination of the object surface. Multifunctional magnifying glass - This lightweight magnifying glass is ideal for close-up work in jewelry, electrician, watch repair , crafts, beauty, painting or general reading aids, and the elderly. 4 types of focal length: 330mm, 200mm, 142mm, 100mm.