*Unique design *Filter can be flipped up BEAR Solar Powered Darkening Welding HelmetOrder No.: GHB1101271),Filter size:108x50.8mm( ... "x2")2),Viewing area:90x32mm(3.54"x1.26")3),Light state:Shade 34),Dark state:Fixed shade 115), 2 arc ... sensors6), Switching time from light to dark: 1/10,000s 7),Delay time:0.2s8),Solar cell,no battery change required9 ...