... Auto-darkening Welding Helmet Order No.:WH8912011 1),Filter size: 110 x 90mm(4.33”x3.54") 2),Viewing area:100x ... Variable shade 9-13,Outside control. 5), 2 arc sensors 6), Switching time from light to dark ... : 1/25,000s 7),Delay time: 0.15s-0 ... Sensitivity: Inside continuous adjustable 9),Solar cell with 2 replaceable lithium batteries 10),Low battery indicator 11), ...