1、Made of fine quality ABS material, wear resistant, can provides long service time. 2、Lightweight, longevity and the more comfortable to carry around with you, it is suitable for all kinds of operation. 3、Comfortable, modern ergonomic design, equipped with flexible headband and bracket(interconvertible), easy wearing and will not occupy your hands, convenient and hands free. 4、Dual LED lights design, two kinds of brightness adjustable, strong light and soft light, suitable for various lighting conditions. 5、Comes with 5 kinds of lenses in different magnifications of 1X/1.5X/2X/2.5X/3.5X, you can choose according to the tothe size of the observed object. 6、The surface of the lens is strengthened and the surface hardness reaches 5H degree, wear resistance and with fine durability. 7、The movable lens slot design can be used to adjust the focal length of the lens and the object and the distance between the lens and the eye. 8、Totally 5 kinds of focal-length adjustable: 500mm, 330mm, 250mm, 200mm, 140mm. 9、Widely used on electronic welding, modelling, stamps collecting, embroidery, antiques, biological observation, reading and etc..