... of fast ,1/25000s. Products meet the indicators1. Model of Lightweight safety helmet :EH-206, Configuration ADF Model: EF9242.2. Fire ... . Power supply: solar cells, two lithium batteries be changed.10. Lightweight safety weld helmet Switching time:a) Light to dark: 1 ... /Tig/argon arc/arc welding/Gas welding.15. Colour of Lightweight safety weld helmet : blue,green,silver,black,yellow,red, And ...