Auto-darkening Welding Helmet With CE, ISO9001 and ANSI certification,useing high quality LCD so as to effectively protect the user. Product instructions: 1) Automatically changes from light state to dark state when an arc is struck 2) The shade number can be set manually between DIN9 DIN13 3) At the moment of stopping welding, the filter screen automatically changes from dark to light state slowly so as to protect eyes from being hurt by the rest arc 4) The ultra high performance of UV/IR auto-darkening filters provide full protection for the user's eyes 5) Protective plate which is free from stained chipping protests the filter screen from being damaged by sparks and particles 6) You can enjoy the simple operation by pushing only one button to select the shade number Model WYAShade No.Light State: DIN 4Dark State: DIN 9 13Switching time (Normal Temperature)≤1/10000sSwitching time delay 0.2s-0.8sUltraviolet Radiation Transmittance313nm ≤0.00006 %365nm ≤0.000076 %Infrared Transmittance780-1300nm ≤ 0.003 %1300-2000nm ≤ 0.009%Working Temperature-5.C +55.CAdjustment of Shade No.AdjustableStandard Working Time≥1000 hoursHelmet MeterialPAPower SupplyAAA alkaline cellsPower on/offAutomaticSize of Vision Field90×40 mmSize of cartridge120×95×11 mmOverall Size360×240×190 mmNet Weight545g