1.Viewing area 90×40mm(3.55×1.58in) 2.UV/IR protection shade DIN 16 all time 3.Light state shade DIN 4 4.Dark state shade DIN9-13(outside adjustable) 5.Power supply solar cells and 2 AAA batteries 6.Battery life 4,000 hours 7.Automatic Power on/off control 8.Switching speed (Light-Dark) 1/20,000 second 9.Delay (Dark-Light) 0.1-0.5 second 10.operation Temp -5°C to +55°C(23°F to 131°F) 11.Meets CE/EN379/EN175 and ANSI Z87.1 standards 12.Rated for use with MIG/MAG、TIG and ARC welding 13.Warranty[...]