Designed for professional welders as well as the occasional user, this helmet features variable shades from 8 - 12, an extended viewing area, an auto-delay function and light sensitivity regulation. When striking an arc, the auto-darkening filter automatically darkens to a shade between 8 - 12. When the arc disappears, the filter automatically switches back to shade 3, providing the user with vision throughout the entire process. With a reaction time of less the 0.0003 seconds, this model is also one of the fastest auto-darkening welding helmets on the market. The auto-delay function prevents the necessity of manually adjustments and eliminates the occurrence of glare when welding with high currents. Well-engineered solar-powered technology makes it unnecessary to change the internal battery over the lifetime of the product.