– This small, yet handy Magnifier is light weight as well as very functional. – Powered by 3 x AAA batteries (3 x AAA Batteries NOT INCLUDED). – With high brightness, two LED lamps can make the magnifier clearer. – Made of high quality ABS and optical glass lens,durable & long time service. – Can be used for close inspection of items like map, circuit boards, hallmarks, stamps, coin collectors, hobbyists and collectors of Antique Styles. – Size: 12 x 3 x 3.4cm – Lens diameter: 1.95cm – Magnification: 40X – Battery: 3 x AAA battery (NOT included)