Suggestion for single-eye viewing - The focal length of this magnifier is 0.5-6.2 inches. It is therefore recommended to use only one eye to view the area, as focus will fail if you use the lenses for both eyes simultaneously. Detachable stand and headband - The magnifier, stand, and hands-free LED headband are interchangeable. They not only effectively solve problems of falling but also ensure better comfort and reduce fatigue. Fully adjustable - The eye magnifier can be rotated 180 degrees up and down. The angle of the light can be adjusted left and right to ensure more precise illumination. 4 interchangeable lenses - 10X 15X 20X 25X, 4 different magnifications can be quickly interchanged. Meet your various work demands. Nice tool for small details - Thanks to its portable design, the illuminated magnifiers are compact and easy to carry. Ideal for close work, jewelry making, detailed painting, watch repair, collectors, sewing, etc. Product description Hands-free design Headband magnifier with 0.5-6.2 inch focal length for one eye. Excellent for collections, tours, jewelry, watch repair, miniature engraving, detailed painting, fishing, and insect studies, etc. Illumination with magnification 2 LED lights provide an evenly illuminated viewing area powered by button cell batteries. Rotate the LED switch clockwise/counter-clockwise to turn the light on/off. Fully adjustable The eyepieces can be rotated 180 degrees up and down. Pull it down when you need magnification; flip it up 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 lens 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 6 cm / 7.48 x 5.51 x 2.36 inches - Headband size: 38 cm Package included: 1 x glasses magnifier 4 x replacement lenses (10x, 15x, 20x, 25x) 1 x elastic headband 1 x User manual Friendly advice: The magnifier is used for close-up work; work and rest moderately to maintain your health. It is recommended to use only one eye to observe the area, as focusing will fail if you use both lenses simultaneously. The higher the magnification, the closer the object of observation must be. It is advisable to choose a suitable magnification cylinder depending on the size of the object to be observed.