1.Viewing area 98mm×48mm(3.86×1.89in) 2.High quality lens 3.UV/IR protection shade DIN 16 all time 4.Light state shade DIN 4 5.Dark state shade DIN9-13 stepless adjustment 6.Power supply solar cells and lithium batteries 7.Battery lifetime up to 4,000 hours 8.Power on/off fully automatic 9.Automatically change filter screen from clear to dark in 1/20,000 second 10.Dark to Light 0.1-1.0 second stepless adjustment 11.operation Temp -5°C to 55°C(23°F to 131°F) 12.Full face and front of neck protection 13.Specially designed headband for greater comfort 14.Meets CE/EN379/EN175 and ANSI Z87.1 standards 15.Great for use with MIG/MAG and ARC welding 16.Total weight 460g