The welding helmets of the Vizor series provide perfect protection for the professional welder and make all welding tasks even safer, more efficient, more precise and more comfortable, irrespective of the welding position. The ergonomic design and well-thought-out functionality combined with high-quality materials guarantee pleasant and stress-free working. Thanks to an even better and more energy-efficient auto-darkening filter cartridge, it has been possible to reduce battery consumption significantly. The Vizor 4000 Professional provides perfect protection for the professional welder and makes all welding tasks even safer, more efficient, more precise and more comfortable. One special feature on this model is the option of selecting from automatic and manual operating modes. In automatic mode, the appropriate level of protection is automatically set within a range from (Shade Level) SL 5 to SL 13. An additional light sensor measures the average power density of the arc and offers an optimum view of the weld seam. In grinding mode, the cartridge is deactivated and remains light.