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