AUTOMATIC, LIGHTNING-FAST REACTION & RECOVERY TIMES. USE FOR ARC, MAG, MIG, MMA, STICK & TIG WELDING, OR PLASMA CUTTING. SOLAR RECHARGABLE, INTERNAL LITHIUM-ION BATTERY CELLS. Sensitivity knob for you to control. "Grinding" can be selective by switch.Time delay switch for you to control switching time from darkness to light. Outside darkness shade level knob. And choose what you want, then pay them together. The item "ART Solar Auto Darkening Welding/grinding Helmet certified hood USA seller" is in sale since Thursday, July 21, 2016. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Welding & Soldering Equipment\Welding Equipment & Accessories\Welding Protective Gear\Welding Helmets". The seller is "etoolstar" and is located in Claremont, California. This item can be shipped to United States.