1.[Up to 23 Magnifications]: Specially designed with 2 lens slots and 1 fixed front round lens (8X), two rear lens slots can load one or two lenses at a time from five lenses (1X, 1.5X, 2X, 2.5X and 3.5X). Up to 23 magnifications can be obtained with 3 lens combinations: 1x, 1.5x, 2x, 2.5x, 3x, 3.5x, 4x, 4.5x, 5x, 5.5x, 6x, 8x, 9x, 9.5x, 10x, 10.5x, 11.5x, 11x, 12.5x, 12x, 13x, 13.5x, 14x. 2.[Comfortable to wear]: Soft and breathable sponge pad headband, two knobs on each side, turn counterclockwise to release the entire lighting frame from the headband, so that you can adjust the entire lighting frame up or down to the desired angle. The tail knob is used to adjust the headband size to fit different heads, pull it outward and turn it left or right to get the right size for your head, and then press it to lock. 3.[More precise lighting angle]: In addition to the adjustment of the entire lighting frame mentioned above, the equipped lighting device can also be rotated 45° up and down when it falls on the entire lighting frame. In addition, the 3 LED lighting parts on the lighting device can be pointed slightly left and right with your fingers to obtain a more precise lighting angle. The lighting device can be removed as an independent handheld flashlight for daily use or outdoor adventures. 4.[Practical function]: Magnifying glass work light, providing a variety of magnifications, helps improve your amblyopia, and allows clear viewing even when sewing. Headband design, completely handheld. Perfect for reading, drawing, observing, modeling, repairing, sewing, soldering, jewelry making, and other hobbies/crafts.