Shop-Tek Welding Helmet, Auto-Darkening, SH1000AE

In full conformity with CE and ANSI Z87 standards. Full range UV/IR protection. Solar power energy with lithium battery for backup. Viewable window 40mmX90mm. Easy user-selectable (DIN) variable shades from 9-13. Clear state:#3. Response time is 0.00005 Seconds or 1/20,000 seconds. Operating Temperature: -5 degrees C ~ 55 degrees C. Power Turns on and off automatically. Adjustable ratcheting headband. Sensitive knob for you to adjust the sensitivity of helmet.