Product Name: Portable magnifier Magnifying power: 5X Light source: 1 x LED lamp Material: ABS Color: Black + White Power: 2 x CR1620 button cell batteries Describe: For seniors or people can read the book, the newspaper and the magazine with weak eyesight. With rotary knob switch in a simple and fashionable design Dimensions: Diameter of the lens: 45 mm Size: 87*84*14mm(folded); 130*84*14mm(opened) Main functions: - Even for fieldwork, office, printing, manufacturing industry, home. Usage: Drag the magnifier to the position less than 150° angle in this case, the light source will not turn. The LED bulb works only in the dark during extension of the magnifier to the position more than 150° - 180° angle.