5 interchangeable lenses: multiple lens choices (1x/1.5x/2x/2.5x/3.5x) to meet your different needs. Hands-free magnifying glass ideal for watchmakers, dentists, electricians, model makers, hobbyists, craftsmen. 2 LED headlamp The glasses also have a lamp with 2 LEDs, which works with 3 AAA batteries (not included). provided due to shipping security). Light enough to operate in the dark or low light conditions. Helmet design with strap: The glasses holder can be changed to a headband (included) to prevent falling and reduce pressure on the bridge of the nose for longer use, thereby reducing fatigue. More comfortable to use: stylish, comfortable and lightweight ergonomic frame with soft padding suitable for all head sizes to fit your glasses reading. The headband not only can be adjusted to fit all head sizes, but ensures a more comfortable and tight fit. Widely used: Helmet magnifier with lamp, perfect for detailed models and painting , crafts, magnifying glass, engraving, sewing, knitting, nail art, eyelashes, reading, repairing or electronic components. Please note that due to manual measurements and display differences, there may be slight differences between individual products and photos.