Our auto darkening helmets are of top quality, very popular on the world markets because of their excellent & reliable quality. The auto-darkening helmet can change automatically from a light state to a dark state when an arc is stuck within a very very small fraction of a second, and it returns to the light state when welding stops. Light shade is a shade 4 which means you could read a newspaper at this light shade. Users can select the correct shade number for their application. The helmet utilizes high performance solar cells as power supplier and two pieces of built-in rechargeable lithium batteries as power backup. - Full face & neck protection - Adjustable headband - Super Light & comfortable - Shade ajustable, auto darken - Fit different filters - Flame resitant ABS & much more