With detachable light source box, which is easy to take out . The angle of lamplight can also be adjusted freely . The lens assembly parts are added to two; you can also overlap tow lenses . You can also use this product even if you wear glasses . Dial adjustment headband conforms to comfortably fits most head sizes . There two parallel lens assembly parts, and you can also overlap tow lenses for getting a highter magnifying multiple . 2 Bright LED Bulb to illuminate Viewing Field . It can be quite easily used under the following conditions: Operate or read at a dim or dark place; Interesting work such as carving, handcraft and sewing; Assemble or repair small fitting; Check the finished product.. Warnings: 1, Do Not put the lens under direct sunshine. The sunshine may focus the lens so that fire is caused. 2, Do Not watch the sunshine through lens. In addition, sometimes you watch the matter reflecting bright light with lens, your eyes will be offended or may be damaged. / Attention: The person wearing nearsighted spectacles should let the focusing distance farther. For the presbyope or farsighted person, the person not wearing spectacles should let the focusing distance farther. . Do not put this product near fire source or at the place with high temperature. Sometimes the lens or the frame may deform or deteriorate for heat . Do not drop or bend the magnifier, or shock it with strong force. It is very dangerous to cut the lens. . Clean the lens lightly with the soft cloth when it becomes dirty