Basic Information: Weight: 550g Material: ABS, Acrylic optical glass lens Product Size: 293 215 60mm Lens Focal Length: 35mm-500mm Product Magnification: 1X, 1.5X, 2X, 2.5X, 3.5X, 8X (Total 23 kinds of magnifications) Light Quantity: 3 LED Battery: 3 AA batteries (Not included) Features: Constructed out of scratch resistant acrylic lens, metal, and ABS, more sturdy and durable. Equipped with 3 energy-efficient LED lights, two levels of brightness is available by pressing the switch on the top of the headset, provides you with strong light and soft light to meet different lighting requirements. With clamps on the head gear, users can set two lenses at a time for easy flipping or switching from one magnification power to another. Ergonomic frame with soft padding for comfortable wear. The adjustable knob on the back can adjust the headband to fit the head size. Ideal for soldering, building models, electronic repair, DIY projects, jewelry, sewing, reading, hobbies and crafts. An excellent choice for anybody interested in studying fine details in artifacts like coins, stamps, miniatures as well as insects and even photographs. Package Included: 1 x Headband Magnifier(built in 1 fixed 8X lens) 1 x USB Cable 1 x Cleaning Cloth 1 x Lens Case 1 x Instruction 5 x Replaceable lens( 1X, 1.5X, 2X, 2.5X, 3.5X)Single-plate Lens Magnification: With 6 lenses in total: Round Auxiliary Lens (8x) 5 Replaceable Back Lenses(1.0x,2.0x,2.5x,3.0x,3.5x) in the storage box,the two back lens slots can be loaded with single one or two lenses at a time from the five(1X, 1.5X, 2X, 2.5X, and 3.5X). 3 lenses combined to get high up to 23 kinds of magnification: 1x,1.5x,2x,2.5x,3x,3.5x,4x,4.5x,5x,5.5x,6x,8x,9x,9.5x,10x,10.5x,11.5x,11x,12.5x,12x,13x,13.5x,14x. Wide Usage: This head magnifier and light suitable for reading, jewelry appraisal, watch repairing, crafting, painting, sewing, knitting, nail art, eyelash, engraving, art or collectibles inspection, electronic device, mechanical and so on. 3 LED Lights Lighting Angle: The magnifier glass equipped with 45 rotation up and down when landed on the whole lighting frame, plus the 3 LED lighting part on the lighting unit can be slightly pointed left and right with fingers for more precise illuminating angle. The lighting unit can be taken down as an independent handheld flashlight for daily or outdoor exploring. Comfortable Portable: Soft breathable sponge padded headband to ensure a great comfort when wearing.Save you from tangled cables during use, and break the limit to the traditional electric circuit for power supply by simply installing 3 AA batteries (Not Included) and take it anywhere. Adjustable Design: Designed with 3 adjustable knobs, you can adjust the lens angle or fold any lens assembled on magnifier, the small round lens (360 rotatable ), it can be rotated upwards if it is not needed. The head mounted magnifier includes 5 interchangeable lens.