Robust electronic welding helmet with auto-darkening, variable shade filter controlled by 2 independent sensors. Comfortable, 5-position head band. Suitable for MIG/MAG or TIG welding and grinding. DIN 9-13 Lens Lens Switching Time: 0.1msec Arc Sensors Suitable for MIG & TIG Welding With Grinding Mode Polycarbonate Construction 2 Independent Sensors Quick Reaction Time Electro Optical Filter DIN 9-13 Lens Lens Switching Time: 0.1msec Arc Sensors Suitable for MIG & TIG Welding With Grinding Mode Polycarbonate Construction 2 Independent Sensors Quick Reaction Time Electro Optical Filter