4 Interchangeable Lens: 10X, 15X, 20X, 25X, 4 different magnifications can be interchanged quickly. Meet your different working demands. Portable design makes illuminated magnifying glasses compact and lightweight for easy carry. Great for close work, jewelry making, detailed painting, watch repairing, collectors, needlework, etc. Detachable Bracket and Headband: Hands free LED magnifier, bracket and headband are interchangeable, not only solve falling-off problem effectively, but also ensure more comfortable and reduce fatigue.Fully Adjustable: Eye magnifier loupe can rotate 180 degrees upwards and downwards. Angle of light can be adjusted leftward and rightward for to ensure more accurate lighting. Suggest Single Eye Observation: Focal length of this magnifying glasses is 0.5 - 6.2 inch, so that suggested to use a single eye for viewing at area only because focus will fail when using both eyes lenses at the same time. Specification: Material: ABS + Optical Lens 4 Kinds Of Lens Magnifications: 10X, 15X, 20X, 25X Field Of View: 1.4' (10X); 1.3' (15X); 0.7' (20X); 0.5' (25X) LED Quantity: 2 Product Size (L x W x H): 19 x 14 x 6 cm / 7.48 x 5.51 x 2.36 inch Headband Size: 38cm / 14.9 inch Package Included: 1 x Glasses Magnifier 4 x Change Lens (10x, 15x, 20x, 25x) 1 x Elasticity Headband 1 x User Manual