the welding  filter is featured as followings .

material: PVC eyeframe

function:  solar power auto-darkening

full enclosure to protect eyes from UV and IR radiation

ergonomic design for comfortable wearing

elastic strap

light state: DIN3

dark state: DIN11

switching time < 0.5 ms at room temperature

battery:  rechargeable Li-Solar combined

min lifetime: 5000 welding hours

viewing area: 98 × 35 mm

cartridge size:  108 × 50.8 × 5 mm