Hunter Optics Mg16129-c Helping Hand LED Magnifier with Clamps 3 kinds of magnifying lens: 2.5X 90mm (diameter), 7.5X 34mm, 10X 34mm An independent bright illuminating light with 5 pcs of LEDs is installed on flexible metal tube Powered by external power adapter(EU power plug ) or 3 x AA batteries (not included) With interchangeable magnification, the two auxiliary lens are stretchable and angle-adjustable, making the operation more comfortable Application range: electronic welding, modelling, stamp collecting, embroidery, antiques, biological observation, reading, etc.