Functional reading aid and image viewing magnifying glass ,- With LED light (2 LEDs) ,- With convenient, slim handle ,- Large lens diameter 90 mm (2 x magnification) for the best view ,- Small lens diameter 21 mm (4 x magnification) for detailed magnification ,- Both lenses are combined in one visual field (bifocal) ,- Also perfect as a practical vision aid for the elderly to help them read comfortably and independently, even in dark or low-light conditions ,- With 3 LR1130 button cells