High magnification: 30x magnification for clear viewing of fine details, aiding those with low vision LED illumination: 12 built-in LED lights provide bright, even illumination in low-light conditions, reducing eye strain Easy to use: Fully assembled, requires 2 AA batteries (not included). Can be used without batteries in sufficient natural light for a lighter feel Distortion-free lens: Made from polished acrylic for a 30x magnification without distortion Wide range of applications: Ideal for reading books, newspapers, magazines, maps, examining jewelry, medicine bottles, and crafts; suitable for all ages Features: Size: 8.07 x 4.21 inches Glass diameter: 3.15 inches Outer diameter: 105 mm Product material: ABS + Glass Lens material: High-definition optical lens Handheld and portable design High-definition optical lens provides a clear, distortion-free image