This headband is a head with 2 LED lights. It has 5 interchangeable 1.0X, 1.5X, 2.0X, 2.5X, 3.5X magnification lenses to meet your vision needs. The ergonomic design offers a comfortable fit, and these n make a great reading aid for people of all ages. Perfect lens The 1 to 2.5x magnifying lens is perfect for sewing and knitting while reading and speaking while the 3.5-fold lens ideal for welding, for creating models, coins, stamps, for identifying watches, for electronic repairs, etc. Specification - Material: Optical lens + ABS - Magnifying glass size: 118x25cm - Magnification of a single lens: 1.0X, 1.5X, 2.0X, 2.5X, 3.5X - Field of view: 21.85 "(1.0X), 15 "(1.5X), 10.94" (2.0X), 7.2 "(2.5X), 6.14" (3.5X) - Battery: 3 * AAA (not included) Package includes 1 x reading 5 x lens: 1.0X, 1.5X, 2.0X, 2.5X, 3.5X Area of application Elderly people, the visually impaired, macular degeneration , Reading books, reading newspapers, crossword puzzles, suitable for children to observe insects, repair electronic products, coins cataloging, producing small, precise artisans, enjoying flowers / potted landscapes, etc.