Monkeybrother Head Magnifier with Leds Lights,Eyeglasses Bracket/ Headband and Interchangeable Lenses: 1.0X, 1.5X, 2.0X, 2.5X, 3.5X Lens external specification:85mmX28.5mm. Lens of changing five kinds of different magnifications. Nose bridge holder, Lens angle and LED Light source angle are adjustable. Movable lens slot,Lens and holder part adopt internal/external meshing structure. Glasses bracket can be changed to headband to ensure more comfortable and tight wearing. Eyeglass frame for hand free use. Lens surface is treated with strengthening process to reach the hardness of H5 degrees. For any strain on lens surface, just flush them with water then dry the moisture with facial tissue.