This product is a specialized device to test cornea contact lenses. Any flaws, impurities, or defects on a cornea contact lens can be viewed very clearly since image of a contact lens can be magnified and projected on the screen in a size of about 10 inches in diameter. It is also a very useful tool for optical shop to demonstrate and promote good quality contact lenses. Specifications: Range of observing impurities and flaws: >0.01mm Magnification times: 17 Illumination: >180Lx Lamp: DC 12V, 100W halogen lamp Dimensions: 430 (L) x 315 (W) x 555 (H) mm Weight: 35 lbs.