Welding Helmet ADF Controls Digital Battery Chemistry Lithium Ion Battery Life 3 000 hr Battery Type Lithium Ion Color Blue/Silver EN379 Classification 1/1/1/1 Features Grinding Mode To Prevent Automatic Darkening When Grinding And Brazing Papr-Ready Twilight Technology Variable Shade Level Grind Mode Yes Helmet Material Polyamide Helmet Type Auto-Darkening Includes (1) Spare Front Cover Lens (1) Storage Bag Includes Batteries Yes Lens Color Green Light State 4