Zoom optical system gives you correct magnification and field of view at all times. Full range of magnification from 4.5x to 20x. 30 degree angle eyepiece for physician comfort. Laser-compatible. Transformerless halogen fiber optic light source with continuous adjustment. Compact center post suspension with both fine and coarse height adjustments. New 5-point base for stability, maneuverability. Uses standard projection bulbs, not special order bulbs. Built-in green filter. Priced as an alternative to single-magnification colposcopes. Video option available. 3 Year Warranty.