... . Light to dark: 1/25,000s Products meet the targetsLCD welding protection mask EH-401/EF98481. Model :EH-401, Configuration ADF Model ... cells, two lithium batteries be changed.10. Switching time of welding protection mask:a) Light to dark: 1/25,000s.b) Dark ... ,EF9848.14. Application:Mig/Tig/argon arc/arc welding/Gas welding.15. Colour Of welding protection mask: blue,green,silver,black,yellow,red, And ...