Automatic welding helmet mask ideal for TIG, MIG-MAG, and MMA welding with darkening adjustment (DIN 4/9-13).The LCD liquid crystal filter automatically darkens when the welding arc is running and quickly returns to its transparent status when the arc is switched off; this means the operator does not need to lower and raise his mask during operations and allows him to work always with both hands freely. Main features: light and comfortable to wear, adjustable automatic darkening filter, solar cell-powered, transparent glass protection filter. Optional: glass protection 90x110mm Kit 2 pcs