Welding helmet - auto-darkening - battery p. S.

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Battery power supply, view window: 3-3/4 x 1-1/2, goggle assembly: 4-3/16 x 3-3/8, ultraviolet ray transmittance rate: 313-, 5nm<2x10%-4, infrared ray transmittance rate: 780-1300<0.0027%, 1300-2000nm<0.097%, Dark state level: 7-13 continuous, auto state-change, eaction time: 0.0001 Seconds, recovery time: 0.05 Seconds, supply voltage: dc6v, automatic power on and off, protects from uv and ir radiation, simple and compact in structure, easy to use, wide view area, excellent performance, maximum safety security, heavy duty nylon construction, heat resistant, weld splatter resistant, full head cover, ratchet headband, weight: 4 lbs.