Solar Auto-Darkening Welding Helmet/Welding Mask/Welding Protection/Welding Face Shield Filter size110×90×9mmViewing Area90×40mmLight stateDIN.3 or DIN.4Dark stateDIN.9-13Switch time1/25000sDelay timeSlow:0.6s-0.8s Fast:0.1s-0.3sPower supplySolar cells with built in rechargeable battery (two 3V lithium batteries)Power on/offFully automaticRate of UV transmittance313nm<0.00006% 365nm<0.00006%Rate of IR transmittance780 1300nm<0.003% 1300 2000nm<0.009%Arc sensor2 piecesOperating temperature-5°C to +55°CStorage temperature-20°C to +70°CEye protectionEN379 1/2/1Sensitivity adjustmentLow/HighWelding helmet shell materialPPWelding helmet weight420gWarranty12 months