Can be used in office, home and classroom. Study of detailed work, such as blue prints, patterns and design plans. Needle point and fine cross stitch work. Close up study of hobbyists' collections, stamps, insects, etc. Scientific study in the classroom or laboratory. 5", 3 diopter distortion free hardened acrylic lens. 10' cord plugs into any standard AC outlet. Uses a 18 watt energy saving curculine tube (included). Durable, lightweight, easy to use.