3M Speedglas Welding Helmet 9100, 06-0100-30iSW, with Auto-Darkening Filter 9100XXi" Battery life ADF: up to 1800 hours Improved optics allow welders to see more realistic colors The 9100XXi silver front panel houses external controls, enabling fast and easy access to the grinding and memory modes Two memory modes that allow welders to set individual settings for dark shade, light-to-dark switching sensitivity, and dark-to-light delay Grab and go with auto-on allows welders to work quickly External grinding mode activation An improved user interface that is easy to understand Meets ANSI Z87.1-2010 impact standard Welding cap, carry bag, and starter kit included