Mat Board Center, Eyeglasses Bracket/Headband Magnifier w/2 LED Lights, 5 Interchangable Lenses: 1.0 x 1.5x 2.0 x 2.5x 3.5x, NO. 9892B2 Glasses bracket can be changed to headband for comfortable and tight wearing. Product Includes 5 Single-Plate Lenses with magnification: 1.0x 1.5x 2.0x 2.5x 3.5x Lenses size are 9.5 cm x 3 cm. Nose bridge holder, Lens angle and LED Light source angle can be adjusted. Uses 3 AAA Batteries for the 2 LED Lights. Note: Batteries are NOT included in this package.