Item Type: 2.5X Lighted Head Magnifying Glasses Material: ABS Built In Lithium Battery: 500mAh (Included) Magnification: 2.5X Use: Dental surgery and other purposes, providing local lighting. suitable for lighting, man machine relationship requirements are high or move frequently scenes. can also be used for different purposes: reading, painting, observation, modeling, repair, sewing, welding, jewelry making and other hobbies or crafts. Package List 1 x Lighted Head Magnifying Glasses 1 x Power Cord 1 x Cleansing Cloth 1 x Screwdriver 1 x Instruction 1 x Aluminum Storage Box 1Adjust Brightness: LED Head magnifier brightness can be adjusted according to your needs, at 420mm working range, the spotlighting size can be adjusted from 10mm to 19mm for best view. 2Clear Image: Headband lighted magnifying glasses adopted latest optical coating technology to reduce reflection and improve image sharpness, provides cool, bright, even and focused light. 3Comfortable Wearing: LED Head magnifier with foam support headband distributes weight and reliefs stress, relieving discomfort and headaches, you can adjust the headband to fit your head. 4Widely Use: Hands free headband magnifying glass can be used in dental, also for different purposes, such as reading, painting, observing, styling, repairing, sewing, welding, etc. 5Reversible Glass: Magnifying glass can be flipped upwards to obtain a perfect view from any Angle, which is ideal for long term tests and surgeries, provide long endurance.