Features:Suitable for most kinds of welding modeDelay time can be selectivethe user’s eyes and face a full protection against UV and IR radiation during the entire welding process， even in the clear stateSensitivity adjustment: you can according your working conditions choose Dark state Shade No: DIN9-DIN13 stepless adjustmentTransition time: ≤2ms 22 ℃ (72 ° F)Delay time(s): <1sPower on/ off Fully AutomaticPower supply: solar cells， No battery change requiredRate of UV transmittance: 313nm<0.00006% 365nm<0.00006%Rate of IR transmittance: 780~1300nm<0.003% 1300~2000nm<0.009%View Window Size: Approx. 9.1cm x 4.2cm/ 3.58" x 1.65"Package Included :1 x Solar Auto Darkening Welding Helmet Lens