Welding Helmet, ADF Controls Digital, Battery Chemistry Lithium Ion, Battery Life 2,000 hr, Battery Type Lithium Ion, Color Black/Gray/Silver, EN379 Classification 1/1/1/2, Features Auto-On/Off, Clearlight Lens Technology, Four Arc Sensors, Four Operating Modes, Improved Digital Controls, Redesigned Headgear, X-Mode, Graphics Metal Matrix, Grind Mode Yes, Helmet Material Nylon, Helmet Type Auto-Darkening, Includes (2) Inside Cover Lenses, (5) Outside Cover Lenses, Helmet Bag