ArcPro 20702 Auto-Darkening Solar Powered Welding Helmet with Grinding Mode, Black 3.86 x 1.61 viewing field Shade DIN 9 to DIN 13 Variable with Grinding Mode 1/10,000 sec. reaction time Permanent Shade DIN 16 for UV and IR protection. Automatic on/off with built-in rechargeable lithium battery