iMeshbean Adjustable Auto Darkening Solar Welding Helmet Arc/Stick /MIG/MAG/ Tig Grinding Many Different Styles USA (Cool Tiger Mouth) CE&ANSI approved; UV/IR protection: DIN16;Clear state:#3;Response time is 0.00005s or 1/20,000s Viewable window 40mmX90mm; Operating Temperature: -5 degrees C ~ 55 degrees C Solar cell backed up with replaceable lithium battery;Switching time: 1/30000S; Delay time: 0.2-1.0S Filter dimension: 110*90*8.5 mm; View size:98*44 mm;Light state shade:DIN4; Dark state shade:DIN9-13 Automatically turns on/off;Adjustable ratcheting headband;sensitive knob to adjust the sensitivity Eliminate long wearing uncomfortable, avoid the mask loose, let the staff in the high altitude used more securely,freely adjusting the button size to fit for different shapes of man&#039;s heads. <span class="a-text-bold">The Battery Card Slot: </span>Backup battery is replaceable. <span class="a-text-bold">Delay Time Adjuster:</span> Adjust the auto darkening welding filter from the dark to light time. <span class="a-text-bold">Sensitivity Adjuster:</span> Adjust the sensitivity according to the operation situation. <span class="a-text-bold">High Quality LCD:</span> Light evenly, image clearly. Solar Cell + 1X CR2032 installed (Replaceable).