Convenient and safe welding visors using liquid crystal technology. Self-darkening welding visor, comfortable and lightweight with external button to switch to grinding mode Advantages Optical class 1/1/1/2 (EN379 standard). Smooth adjustment of shade grade 9-13 with external knob. External button to switch to grind mode (darkening degree - 3.5 DIN). Field of view (filter): 4,312 mm² Cartridge size (mm): 110 x 90. Min. blackout current for TIG: 10 A (AC or DC). 2 optical sensors.