The jumbo size 138mm 2X magnifying glass is ideal for reading books, newspapers, and maps, while the 4X auxiliary lens is perfect for examining fine prints and images. The 10X loupe is suitable for jewellery appraisal, circuit boards. Equipped with three energy-efficient LED lights built in the handle. The lights provide an evenly lit viewing area, perfect for nighttime book reading and use in low light applications. The lights run on three AAA batteries(Not included)