The headband magnifier is made of high quality material which is safe odorless non-toxic environmental and durable. Bright lights are powered which can last for long hours and ensure perfect illumination in any condition even in a dim or dark place. Such a wonderful goods just bring it home! Product Description: ADJUSTABLE MULTIPLE MAGNIFICATION: 4 Pairs of replaceable lens included with different magnifications (10X 15X 20X 25X) can be interchanged quickly; If this magnifier is used for long time you may use two lens barrels alternately to eliminate visual fatigue and improve work efficiency. HUMANIZED DESIGN:: It can help you work in the low-light. Detachable bracket and headband ensure tight wearing and reduce fatigue. It can be used in mechanical processing electronic repair jewelry appraisal timepieces repair and miniature engraving etc MORE SUITABLE FOR CLOSE OBSERVATION: Head Mount Magnifier can only see at very close range.Handsfree eyeglasses bracket and headband are interchangeable to ensure more comfortable and tight wearing. Too high magnification is not suitable for reading books and soldering electronics. Please NOTE: It is a useful and portable observing tool but generally if you wanna observe some objects you can not use your right and left eyes to watch at the same time just only one eye and also you d better take turns to see and be near from the things that you want to look. Specification Type: Eyewear Magnifier Material: ABS+ Acrylic glass Magnification times: 10x 15x 20x 25x Battery: 3 x AAA battery(not included) Package Included 1 x Eyewear magnifier 1 x Headband 4 x Pair of lens 1 x User manual Pay Attention to: 1. Do not place it directly in sunlight to avoid fire. 2. Do not use the magnifying glass to observe the sun to avoid burning glasses. 3. Do not wipe the lens and case with chemical liquids such as alcohol or benzine. 4. Wipe the lens with a soft cotton cloth.