Single Eye Viewing Suggestion - The focal length of this magnifier is 0.5-6.2 inch. So it is suggested to use only one eye to view only the area as the focus will fail if you use the lenses of both eyes at the same time. Detachable Stand and Headband - Magnifying glass, stand and hands-free LED headband are interchangeable. They not only effectively solve the problems of falling, but also ensure better comfort and reduce fatigue. Fully Adjustable - Eye Magnifier Magnifier can rotate 180 degree up and down. The angle of the light can be adjusted left and right to ensure more precise illumination. 4 interchangeable objectives - 10X 15X 20X 25X, 4 different magnifications can be interchanged quickly. Respond to your different work requests. Nice Tool for Small Details - Thanks to its portable design, the illuminated magnifiers are compact and lightweight for easy carrying. Ideal for close work, jewelry making, detailed painting, watch repair, collectors, needlework, etc. Hands-free design Headband magnifier with 0.5-6.2 inch focal length for one eye. Great for collections, tours, jewelry, watch repair, miniature engraving, detailed painting, fishing and insect study, etc. Lighting when to magnify 2 LED lights provide an evenly lit viewing area powered by button cell batteries. Rotate the LED switch clockwise / counterclockwise to turn the light on / off. Fully adjustable Eye patches can be rotated 180 degrees up and down. Pull it down when you need magnification; flip it over when you don't. The angle of the light can be adjusted left and right to ensure more precise illumination. Specification: - Material: ABS + optical lens - 4 types of objective magnifications: 10X, 15X, 20X, 25X - field of view: 1.4 ' (10X); 1.3 ' (15X); 0.7 ' (20X); 0.5 ' (25X) - LED quantity: 2 - Product Size (L x W x H): 19 x 14 x 6cm / 7.48 x 5.51 x 2.36inch - Headband size: 38cm Package included: 1 x glasses magnifier 4 x change glasses (10x, 15x, 20x, 25x) 1 x elasticity headband 1 x User Manual Friendly advice: The magnifying glass is used for work close to the eyes; please work and rest moderately to maintain your health. It is suggested to use one eye only to observe the area as focusing will fail if you use both lenses simultaneously. The higher the amplification, the closer the object of observation must be. It is advisable to choose an appropriate magnification barrel according to the size of the object to be observed.