Replace a damaged darkening filter in your DEWALT DXMF21011 Welding Helmet with this manufacturer certified replacement. Made to the same specs as the factory original filter, this replacement features 4 lightning fast sensors that engage to darken the viewing lens in a mere 1/15,000 of a second to protect your eyes from UV and IR light. The independent shade control has 3 separate modes to let you fine tune the DIN level according to your needs with a DIN 4 grinding mode, DIN 5-8 cutting mode, and a DIN 9-13 welding mode. You can even customize how long the filter takes to lighten after completing a weld from as quick as 0.2 seconds to a longer 1.0 second. To provide maximum useable life the filter is powered by an included CR2450 battery that is augmented by a solar cell that charges as you weld to prolong the battery’s charge.