Combined lens magnification: one of the greatest advantages of the forehead magnifier kit is that it has two lens slots. The three interchangeable lenses can be combined into two at will. Up to 6 magnifications can be achieved, with a maximum magnification of up to 4.5x. Adjustable brightness and angle: there are two brightness levels which provide excellent light for the illumination of detailed surfaces. At the same time, the angle of the light source can be adjusted so that the light source can shine its light precisely on the surface of the object. Efficient and rechargeable: fully charged in 1 hour. No more need to buy batteries, saving weight, money and energy, while enjoying long-lasting illumination. In addition, the acrylic resin lens has a surface hardness of 5H degrees and can be rotated by 90 degrees. More comfortable design: the ergonomic frame is lightweight, comfortable to wear and holds better in front of the eyes. The headband effectively prevents the nose bridge support from slipping over the nose, so it is easier to work for long periods of time