Lighthouse magnifier with amazing 20x magnification. Black matte plastic housing. Lens diameter: 13⁄16" (21mm). 1 Powerful LED. Includes 3 LR1130 batteries. Dimensions: 2 1/8" x 1 5⁄16" x 15⁄16". For more information as well as questions to answers you may have, check out our Coin Magnifier Info Guide.