The Barr & Stroud M-1 LED Magnifier is a superb blend of ergonomics and technology. The M-1 is a robust aluminum construction with a lens made of high quality optical plastic. It is easy and comfortable to use. The M-1 contains a 90mm lens with 2.5x magnification with a ground-in lens of 20mm with 4x magnification. The special thing that makes this magnifying glass so useful is the integrated, newly developed LED lighting with LEDs that can be adjusted in three brightness levels, so that it can be used in any lighting situation. The Barr & Stroud M-1 is one of the finest hand held magnifiers available today. You need 2 x AA batteries for the lighting. Scope of delivery: magnifying glass bag! Power supply and batteries are not included!