Klutch Large View Auto-Darkening Variable-Shade Welding Helmet - 800 Series, Gloss Black Finish 913 variable shades with super fast 1/25,000 second reaction time Delay time control and sensitivity control to maximize protection Unique construction conveniently keeps all of the control knobs on the outside of the helmet for easy adjustments without having to remove the helmet 4 arc sensors are built in for superior performance High quality LCD allows for clearer viewing of the welding object and your surroundings