Featuring four sensors for improved performance, the solar-powered, lightweight Weldskill Auto-Darkening Welding Helmet can be used in either weld or grind mode and will darken when TIG welding, even at 5 amps. It switches from light to dark automatically in 1/30,000 of a second and from dark to light at any of three speeds that the user selects. Both sensitivity and delay knobs are on the outside of the helmet so the user can make adjustments while working. The helmet's recessed lens design protects the faceplate from scratches when the helmet is set down.