Features With an LED optical magnifier, magnify the object by 20 to 40 times its original size. Extremely bright LED lights illuminate the elements you are examining even in the dark. Widely used in microelectronics, precision machinery, jewelry, watchmaking, archaeology, biological anatomy, school teaching and other fields. This HD optical lens with high transmittance provides clear image and distortion-free magnification. Designed for anyone looking to read or observe small text details or parts. Specification: Condition: 100% Brand New Item Type: Magnifier Material: ABS + Optical Lens Magnification: 20-40X Lens diameter: 14 mm / 0.6 inches. Battery: 3 x LR43 button cell batteries Package List: 1 x Magnifying Glass 1 x Instruction 2 x Glass Slides 1 x Base Package List 1 x Magnifier 1 x Instruction 2 x Glass Slide 1 x Base