Specification: Item Type: 2.5X head mounted magnifying glass Material:ABS Use: Dental surgery and other medical purposes, providing local illumination. Suitable for lighting, man machine relationship requirements are high or move frequently scenes. Can also be used for different purposes: reading, drawing, observing, modeling, repairing, sewing, welding, jewelry making and other hobbies or crafts. Built in lithium battery: 1000mAh (shipped with built in battery) Magnification: 2.5x Light source brightness: 15000-40000 LX Available continuous use time: 5 hours Package List: 1 x Head Mounted Magnifying Glass 1 x Illumination Light 1 x Power Cord 1 x Led Battery 1 x Instruction Manual 1 x Eyeglass Clip 1 x Screwdriver 1 x Cleaning Cloth 3 x Screws 3 x Nuts 1 x Lanyard 1 x Light Wire Tie 1 x Storage Box How to Use: 1. Control by turning the interpupillary adjustment knob back and forth. To start, separate the 2 telescopes as far as possible and turn a single knob until the images converge into a circle. The magnifying glass has a preset working distance. Be sure to position back and forth to find an optional focus distance. 2. Adjust the angle of the magnifying glass to see the object clearly. When you are not using the eyepiece, you can adjust the eyepiece up to line of sight. 3. Double side lock is to fix the lens to get a good image, please don't adjust it.WIDE USE: Lighted magnifying glass is also very suitable to be a very useful tool for dentist to use during their work, also for a variety of purposes, such as reading, painting, observing, modeling, repairing, sewing, welding, jewelry making and other hobbies or crafts. QUALITY MATERIAL: Jewelers loupe magnifying glasses is made of quality material, comfortable to wear. Beautiful and useful, dull polish outside. Can be like a pair of eyeglasses mounted on the head of the magnifying glass, which can meet your needs for close work Kind of demand. FLEXIBLE LIGHT ANGLE: Light Angle of the head magnifier can be left and right down adjustment for different needs to ensure accurate irradiation of light source on the surface of viewed object, making it more convenient in use. You can also free your hands and concentrate on the objects you want to observe. EASY TO USE: The head-mounted magnifier with light has a wide range of usability, which is very suitable for close work. Builted-in 1000mAh lithium battery, so you can enjoy long lasting bright light. Light Angle can be left and right down adjustment, this part can be detachable for portable flashlight. Coming with a storage box, it will help to keep it tidy. COMFORTABLE SAFE: The head-mounted hands-free magnifier is an ergonomic spectacle frame, which can effectively prevent the magnifier from falling and reduce the pressure on the bridge of the nose, ensuring firm wear and reducing fatigue during long-term use. The head is comfortable and safe to wear.