Viewing area:92×42mm Cartridge size:110×90×9mm Arc sensor:2 Optical class：1/1/1/2 Light state:DIN 4 Dark state:variable shade, 9 ~13 Shade control:external,variable Power ON/OFF:fully automatic Sensitivity control:auto UV/IR protection:DIN 16 Power supply:solar cells+2*CR2032 lithium batteries Switching time:1/15000s,from light to dark Dark to light（Delay）:0.1-1.0 auto Low amperage TIG:≥10amps(DC), ≥10amps(AC) Grinding function :yes Low volume alarm:yes Operating tep:-5℃~+55℃ Storing tep:-20℃~+70℃ Packed by color box