Welding Helmet ADF Controls Analog Battery Chemistry Lithium Ion Battery Life 3 000 hr Battery Type Rechargeable Color Black EN379 Classification 1/1/1/2 Features Delay Control Externally Activated Grind Button Sensitivity Control Grind Mode Yes Helmet Material Nylon Polycarbonate Helmet Type Auto-Darkening Includes Bandana Replacement Lense Includes Batteries Yes Lens Color Clear Lens Material Glass Light State 3 Magnification Yes Number of Arc Sensors 4