Brand New Auto Darkening Welding Helmet Mask****Description*****Ideal for ARC、 SMAW、 MIG(Heavy)、 MIG (Light)、 GTAW、 SAW、 PAC、 PAW Plasma welding processes and many others、 but cannot be used for Autogen or Laser welding.*Auto-Darkening system to protect eyes and face from harmful sparks、 spatter and radiation during normal welding conditions.*Lightweight / Durable Construction to Reduce Fatigue when Wearing for Long Periods of Time.*Adjustable Head Straps to ensure a tight fit so no hands required、 leaving hands free for welding.*This Welding Helmet uses the latest LCD technology to automatically tint the viewing window as soon as you start welding.****Features*****Light state: DIN4Dark state: DIN9-13 ( 9、11 or 13 )Switching time: <0.5ms at room temperatureDelay time Setting: slow/ fast:0.2s~0.8sViewing area: 99 x 44 mmCartridge Size : 110 x 90 x 5mm (4-1/3" x 3-5/9" x 1/5")UV penetration:<0.0003 at 313mm-365nmIR penetration:<0.027 at 780mm-1300nm<0.085 at 1300mm-2000mmPower turns on and off automaticallyAdjustable ratcheting headband with quality foam headstrap for superior comfortFull conformity with CE and ANSI Z87 StandardsPolymide Nylon Construction with textured helmet surfaceOperating Temperature -10C to 60C450g