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Interchangeable Lens DesignFeaturing 5 lenses with magnifications from 10X to 35X this magnifier gives you the right level of zoom for any task The scratchresistant acrylic lenses are lightweight and easily swappable Lighted Magnifier HeadsetEquipped with builtin LED lights and dual brightness settings it provides excellent illumination for closeup work Powered by 3 AAA batteries not included Ergonomic Frame DesignThe soft nosepads and adjustable frame ensure longlasting comfort Can be easily converted to a headband style for a more stable handsfree fit MultiPurpose UseIdeal for crafting embroidery crossstitching knitting soldering jewelry inspection and other detailoriented tasks Lightweight ComfortableWith a 3ounce frame and lightweight acrylic lenses this TMANGO magnifier headset is designed for comfort during extended use The elastic head strap ensures a secure fit even when worn over prescription glasses This headmounted magnifying tool is intended solely for hobbies crafts industrial inspection and precision tasks It is not a medical device and does not serve as vision correction eyewear