USA seller DMN New Auto Darkening Solar Powered Welders Welding Helmet Mask With Grinding Function Full range UV/IR protection up to shade DIN 16 all time Darkness shade control (DIN) from 9-13, Clear shade 4 in full conformity with CE and ANSI Z87 standards AUTOMATIC, LIGHTNING-FAST REACTION & RECOVERY TIMES "Grinding" can be selective by switch