... LBD direction. 1. Auto-darkening Welding Safety Helmet Model:EH-301, Configuration ADF Model: EF9848.2. Fire resistanc: yes.3. Material & Weight ... cells, two lithium batteries be changed.10. Auto-darkening Welding Safety Helmet Switching time:a) Light to dark: 1/25,000s ... argon arc/arc welding/Gas welding.15. Auto-darkening Welding Safety Helmet Colour: blue,green,silver,black,yellow,red, And beautiful ...