92 x 42mm vieweing areas Adjustable dark state Din 9-13 AS/NZ 1337.1 2010 certified AS/NZ 1338.1 2012 certified Battery powered with solar-assist Bonus cover lenses Suitable for welding & grinding Two independent arc sensors 0.00004 sec lens darkening reaction Working temperature: -5c to 55c (23f to 130f) Shade state: #9 - #13 UV/IR protection: Din16 Sensitivity adjustable 15-20 min auto shut off Power supply: Solar cell