This magnifying glass is worn around your neck freeing your hands to do the work and comes with a battery operated light for night time work. The clip on light is used for "shadow-less" operation. Simply adjust the neck string and lean the magnifier against your chest. The 2x power 100mm lense and 4x power bi-focal spot lense is perfect for reading, sewing, close-up repairs, model building, fishing lures etc. (2 x AA batteries not included).