Variable Shade 9-13, Sensitivity & Delay Adjustments, plus Grind-Mode switch, lock the lens in the light shade.| Ultra-clear vision - Optical rating 1/1/1/2.| Viewing Area 96 x 39mm.| Hinge & Lock Lens Retainer System means easy cover lens replacement, Seals tightly against spatter to prevent damage to the electronic lens.| Magnification lens holder - takes standard magnification lenses.| Full Laminate Lens Construction: Each layer in the electronic lens assembly is firmly laminated for superior optical quality and long service life.| This is in contrast to cheaper lenses which are simply glued on the edge and, over time, are prone to contamination and failure.| Lightweight, Durable and Shock Resistant shell.| Auto-on & Auto-off means No buttons to press, Hassle-Free operation.