Optivisor headband magnifier with headband, model DA-5, 2.5x magnification; can be worn over eyeglasses Optical glass prism lens, ground and polished with a beveled edge, mounted in a replaceable plastic frame Adjustable headband fits all head sizes; foldable prism holder does not obstruct the field of vision; can be worn over prescription or safety glasses Working distance approx. 20 cm; size 20 x 5 x 24 cm; weight approx. 160 g Soft, comfortable headband; peak and headband made of high-quality plastic Made in USA .
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