The 3M™ Adflo™ Powered Air Purifying Respirator and 3M™ Speedglas™ Welding Helmet 9100-Air with Auto Darkening Filter 9100XXi offers the welder compact, lightweight respiratory protection and quality filter optics all-in-one. The 3M Adflo PAPR features a lithium ion battery, high efficiency particulate filter, and wide leather belt. Audible and visual alarms signal low airflow and low battery charge. The high efficiency particulate filter can be "stacked" onto an optional 3M™ Adflo™ Cartridge (not included) for additional protection against OV/SD/CL/HC vapors.With improved optics, the 3M™ Speedglas™ Auto Darkening Filter 9100XXi allows you to more readily recognize colors as compared to our other models. This may help you focus on your welding set-up, welding technique, precision grinding, and inspection of just completed welds.Other features include:• Grab and go with auto-on• The 9100XXi silver front panel houses external controls, enabling fast and easy access to the grinding and memory modes.• Two memory modes that allow you to set individual settings for dark shade, light-to-dark switching sensitivity, and dark-to-light delay.• External grinding mode activation• An improved user interface that is easy to understand• 3M™ Speedglas™ Auto Darkening Filter 9100XXi offers a 2.8" x 4.2" viewing area (approx)• Selectable Shades 5, 8-13 and Shade 3 light state.• Delay function to set the dark-to-light opening time.• Sensitivity of the arc detection that can be adjusted• Comfort mode for tack welding and two-step recovery are not available with this model.• Side windows - Shade 5 side filters that help increase peripheral vision• Ergonomic, adjustable head suspension for increased comfort, helmet stability and weight distribution• NIOSH-approved system; meets ANSI Z87.1-2010 high impact.• Storage bag, welding cap, and starter kit included