The Magnalight is small and light-weight enough to carry in a shirt pocket. The light is activated by pressing the button, or the light it can be locked on, by pushing down and forward at the same time. The 5x magnifying lens provides a working distance of approximately 2", with an excellent field of view, and shines a consentrated round spot on your work. An excellent gift for Lab Technicians, Electrical Engineers, Industrial Inspectors, Pilots, Hobbyists, Naturalists, Stamp Collectors, and Coin Collectors, to name a few. AAA batteries are included for instant illuminated magnification.