The Jackson Safety W70 BH3 Grand DS auto darkening welding helmet with Balder Technology has an auto-darkening lens filter (ADF), a high-density plastic shell, sensitivity and delay settings, adjustable headgear, and it meets the American National Standard Institute/International Safety Equipment Association (ANSI/ISEA) Z87.1-2010 standard for impact protection and welding use, and Deutsches Institut für Normung (DIN) DINplus requirements for production quality. The ADF has a variable shade range from 9 to 13 to protect the wearer"s eyes from radiant energy during a range of welding tasks, and its adjustable sensor sensitivity helps prevent auto-darkening from being triggered by other light sources. It has an adjustable delay setting to change the amount of time it takes for the helmet shade to return to normal after darkening, providing protection during welding tasks of different duration. The controls for settings are internal for protection and positioned on the lens cartridge. The welding helmet"s high-density plastic shell protects the wearer"s face, forehead, neck, and ears from weld sparks and spatters. This helmet comes with an adjustable ratchet suspension with a three-position slider to adjust the distance from eyes to lens, a crown strap adjustment to raise or lower the helmet, and a large ratchet with a soft rubber grip that can adjust size without removing the helmet. The helmet is hard hat compatible using Jackson Safety 187-S mounting blades (sold separately), and magnifying lens (also called "cheater lens") compatible using Jackson Safety 37245 adapter (sold separately). SpecificationsPropertiesValuesDarkened shadesFrom 9 to 13Light shade4Viewing field size3.8 x 2.7 inches (96 x 68.5 mm)Lens switching speed0.15 microseconds at normal operating temperature Arc sensors2Weight19.84 oz.Adjustable delay rangeFrom 0.1 seconds to 1.0 secondsOperating temperature14 degrees F to 140 degrees FCartridge size4.33 x 4.33 x 0.31 inchesPower supplySolar cell Welding helmets (also called welding masks) are protective headgear worn to protect the wearer"s face, forehead, neck, and ears from weld sparks and spatters and to protect the wearer"s eyes from radiant energy and highly-concentrated ultraviolet (UV) and infrared (IR) rays emitted during welding tasks. These helmets consist of an outer shell and a pivoting suspension system so the helmet can be lifted up and out of the wearer"s line of sight when not needed. A window with a shaded filter lens in the helmet allows the wearer to see while working and provides various levels of protection. Different types of welding tasks require different shade levels. Lenses may be fixed shade, or variable shade for use with a range of welding tasks. Lenses may be passive, requiring the wearer to lift the helmet up to see between welding tasks, or auto-darkening, requiring a power source and sensors to quickly switch the lens from a lower shade level to a higher shade level during arc flashes. Auto-darkening filters (ADF) that meet the ANSI Z87.1-2010 standard provide protection from UV and IR rays even in the lightened state. Jackson Safety, a Kimberly-Clark Professional brand, manufactures personal protection equipment (PPE), welding safety, and other work zone safety products. Kimberly-Clark, founded in 1870, is headquartered in Dallas, TX.