Feature: Made of high quality acrylic and lenses with 2 LED light, which is long-lg to use. Humanitarian design makes our headband magnifier more comfortable and practical. Perfect for Sewing, mining, painting and machine repairing. Specification: Name: Headband Magnifier Weight: Approx 317g Material: Acrylic lenses ABS Magnifying Glass Size: Approx 95 42 mm Eyeglass Frames Size: Approx 222mm 145mm 65 mm Single-plate Lens Magnifications: 1.0X,1.5X,2.0X,2.5X,3.5X Field of view: Approx 555mm(1.0X),381mm(1.5X),278mm(2.0X),183mm(2.5X),156mm(3.5X) Battery: 3 AAA(Not included) Package include: 5 Acrylic lenses:1.0X,1.5X,2.0X,2.5X,3.5X 1 Eyeglass Frames 1 Elastic Headband 1 Carry BoxExtended lenses in the lens is arranged below the middle, has open a "U" shaped notch, the design can make the eye lens and the distance closer, make the eye field to be wider, and observe the object more easily. UNIVERSAL USAGE: 5 interchangeable lenses(1.0X,1.5X,2.0X,2.5X,3.5X) with scratch-resistant acrylic reduces weight.Perfect for the elderly,electricians,jewelers,reading and everyday users while soldering and working with small parts and details. SOLID DURABLE: Lens part and bracket part adopt internal external meshing structure to avoid falling-off in time of viewing and reading, both parts can be repeatedly turned over when they are not used temporarily, with solidness and durability. USER FRIENDLY: Comfortable eyeglass frames for quick on off or for more secure fit,switch to elastic headband. Lens angle and LED light source irradiating angle can be adjusted to ensure accurate irradiation of light source on the surface of viewed object. More convenient to use. GOOD QUALITY: Lens surface is treated with strengthening process to reach surface hardness of H5,only to give you a better visual experience and set your hands free.