HEAD-MOUNTED DESIGN: The head-mounted and hands-free magnifier is an ergonomic glasses frame, which can effectively prevent the magnifier from falling and reduce the pressure on the bridge of the nose. It is lightweight and does not slip, ensuringfirmness and wear resistance, and reducing long-term fatigue. You can also free your hands and focus on the objects you want to observe. INTERCHANGEABLE LENS: The magnification times of our headband magnifiers: 8 times, 15 times, 23 times. It can meet your close working needs. It is recommended to choose the objective with appropriate magnification according to thesize of the observed object. The magnification can be quickly switched. MONOCULAR OBSERVATION: We recommend that you only use one eye of the binocular loupe to observe the object, because when using two glasses at the same time, the focus will fail. You can use both lenses alternatelyto eliminate visual fatigue and effectively improve your work. Please note: This magnifier is suitable for close-range work, please observe the object when it is close enough to the target. PERFECT DESIGN: These magnifying glasses with telescopic legs, with adjustable flip-up brackets. Both lenses are equipped with LED lighting, which is very convenient to use when the light is poor. MULTI-FUNCTIONAL APPLICATIONS: head magnifier with light has a wide range of uses and is ideal for close-up work, such as reading, watch or circuit repair, crafts, jewelry identification ,eyelash extension, welding, painting, etc. is very suitable for helping watch repairers, jewelers, the elderly, short-sighted or short-sighted to observe nearby objects. Features: Name: Magnifying Glasses Material: ABS + Acrylic Lens Size: about 155 x 55 x 85mm/6.1 x 2.17 x 3.35in Glasses Open Legs: about 175 155 55mm/6.89 6.1 2.17 in Gross weight: about 98gMagnification times: 8 times, 15 times, 23 times Lens focal length: approx. 62mm/0.2in approx. 33mm/0.12in approx. 21mm/0.07in Color box size: approx. 160x 72 x 51mm/6.3 x 2.83 x 2.01in Battery model: button cellLR1130 Light source: 2 LED lights Packing list: Magnifiers 1 (with button battery) Instructions 1 Notes: Due to lighting effects and shooting angles, there is some color difference in the product, pleaseto understand. Due to manual measurement, there is tolerance in the product size.