With a push of a button, the units shade 4 grinding mode is activated. A blinking LED light inside of the helmet indicates that the grinding mode is on and the ADF cartridge is deactivated, all with out removing your helmet. If you forget to reactivate the ADF it does it itself in ten minutes. Adjust the shade level control knob to select the shade within settings of 5-9 or 9-13. Selections can be made according to the welding process making this one of the most versatile helmets on the market. Adjustable to meet different welding applications including micro plasma, plasma cutting, gas welding, and low amperage, TIG welding to name a few. Match the sensitivity level to your specific need. Adjustable sensor bar eliminates the effects of ambient light. Simply slide the sensor bar up and the angle of detection will open from 60 degrees to 120, which optimizes performance during low current and over the head welding. Keep it down and reduce the chances of a near by arc darkening your lens. The multifunctional injection molded spherical cover lens not only reduces reflection thus providing better visibility and optics, but its foam gasket ensures the protection of the ADF filter by sealing out harmful dust, spatter and moisture particles. The lens is molded thicker to resist heat warping during high amp welding. Proven solar technology ensures a continuous power supply while also eliminating the need for on/off switches and untimely/costly battery changes. Several LCDs and special filters provide permanent Shade 14 protection from dangerous UV and IR radiation, even in the light state.