This is the binocular magnifier used by gemologists, preferred for viewing fine details while keeping the hands free. Made of durable yet lightweight ABS, the magnifier includes six pairs of interchangeable plastic lenses that are ground and polished to precise optical standards, providing magnifications of 1 1/2 X, 1 3/4X, 2X, 2 1/2X, 2 3/4X, and 3 1/2X. The headband adjusts to fit any head size and is padded with felt in the front for comfort. The visor can be worn over prescription or safety glasses and can be tilted up out of the way. An adjustable light clips to the visor and is powered by a clip-on battery pack. Two AA batteries (not included) provide up to six hours of power for the light's xenon bulb. Made in the U.S. (12 oz.)