Specifications for the Galaxy self-darkening welding helmet Filter size 110X90X11mm UV radiation ratio 313-365nm<3.4x10-6 % Infrared beam 780-1300nm<0.0027% transmittance rate 1300-2000nm<0.0097% Shade ratio 9-13 variable within this range Lightening 3 Switching time 1/20000s from light to dark Recovery time 0.1s to 0.8s from dark to light adjustable Power supply Solar cells Eye protection EN379 1/2/1 Face protection EN175 Auto shut-off Yes Net weight 490g ±10g