Product: Donegan DA-7 OptiVISOR Headband Magnifier, 2.75X Magnification Glass Lens Plate, 6" Focal Length
Brand: Donegan Optical
Headband binocular visor with snap-in 2.75X magnifying lens plate for hands-free viewing
Ground and polished glass prismatic lens for improved focus and reduced eye strain
Visor size-adjustment knob for customized fit
Visor tilts out of way when not needed
6" focal length for a variety of uses

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