The revolutionary Quasar Lighting System is designed specifically for use with the Optivisor binocular magnifier. Employing the latest in LED technology, Quasar lighting strategically surrounds each lens with ultra-bright beams of white light that virtually eliminates shadows and increase visibility...especially good for viewing in holes and deep cavities. And the super-efficient LED's require little power...so the batteries can last up to 96 hours. The lightweight Quasar easily fits on your magnifying visor The result is breath taking clarity of image with greatly reduced shadow. Provides superior illumination. Unsurpassed for tool & die work, jewelry making and dental laboratory applications. Includes: two Energizer® AA batteries mounting strap mounting pins battery compartment MAGNIFYING VISOR NOT INCLUDED.