Filter size:  110×90×9mm
Viewing Area:  98×40mm
Light state:  DIN.3 or DIN.4
Dark state:  DIN.9-13
Switch time:  1/25000s
Delay time:  0.6s
Power supply: Solar cells & lithium batteries
Power on/off:  Fully automatic
Arc sensor:  2 pieces
Welding helmet weight:  420g                           Extra functions: Sensitivity adjustment small current welding. Switching set for less than 20Amps TIG welding.