Feature1.Interchangeable lens design: 4 interchangeable lenses, four multiples, viewing clear.The magnification rates were 1.5, 2.5, 3.5 and 5 times, respectively.2.The lens is made of acrylic resin, the surface hardness of the lens reaches 5H level, more wear-resistant and durable.3.Adjustable brightness levels: There are two brightness levels that provide excellent light to illuminate detailed surfaces.Pressing the switch on the frame provides two kinds of brightness.4.Comfortable and easy to use: ergonomic glasses frame, comfortable to wear, better fixed in front of the eyes.The headband effectively prevents drops, making it easier to work for long periods of time.5.Efficient rechargeable battery: can be fully charged in 1-2hour.SpecificationMaterial: Acrylic ,ABS plastic,LEDMagnification: 1.5X 2.5X 3.5X 5.0XLens Diameter: 333/200/142/100mmSize: 185*175*30mmLens: 4pcs/setIllumination: 2LEDPower by USB Rechargeable