Description Perfect for use with MIG, TIG & ARC welding Lens automatically darkens when arc is struck & returns to normal when welding stops Protects against UV and IR rays Extra large view - 9-1/2"square inch lens Variable shade adjustment from 9-13 DIN Easy adjust comfort headgear Lens Viewing Window Size: 4"x 2-3/8"(100mm x 60mm) Response Time: Adjustable down to 0.1ms Shade: 9-13 DIN variable adjustment Working Temperature: 23_F to 131_F Power: Solar cells with Auto Battery backup Auto Power ON/OFF: Yes Eye Protection: EN379"1/2/1 Face Protection: EN175, UV/IR Weight: 1.5 lbs.