Class:1 / 1 / 1 / 2 .Viewing Area:92×42mm .Cartridge Size:110×90×9mm Arc Sensor:2 , Light State:DIN 4 .Dark State:Variable shade, 9 ~13 Shade Control:Automatic .Power On/Off:Fully Automatic Sensitivity Control:Automatic .UV/IR Protection:DIN 16 Power Supply:Solar cells. Re-chargeable battery No battery change required Switching Time:1/15000S,from Light to Dark Dark to Light:0.25-0.45S Auto Low Amperage TIG:≥35amps(DC), ≥35amps(AC) Grinding Function:YES. Low Volume Alarm:NO. ADF self-check:NO Operating Tep:-5℃~+55℃ .Storing Tep:-20℃~+70℃ .Warranty:2 Years, Weight:450g Accessories: Out protection lens 1PC；Inner protection lens 1PC