Pyramex Matte Black Auto Darkening Helmet WHAM1020MB Superior comfort with pivot style headgear Made of high-impact resistant nylon Four independent arc sensors in a staggered design to deliver the most reliable arc detection. High speed lens 1/30000 second Powered by solar cells and replaceable lithium-battery Includes magnification lens holder Fully adjustable nylon suspension Pyramex Leadhead Matte Black Auto Darkening Welding Helmet WHAM1020MB