The new & improved Viking 2450, our lightweight premium helmet series, offers an excellent blend of optics, comfort & versatility. Industry Leading Optics: 4C Lens Technology - Broadens the color range & hues which can be seen in both light and dark states. This eliminates imperfections and color saturation to create the clearest view of the base material, arc & puddlePerfect 1/1/1/1 Optical Clarity - This rating is determined by measuring blurriness, distortion, shade consistency and angle uniformity of the auto-darkening welding lensExtra Large Viewing Area - The 9.3 square inch auto darkening lens provides a large field of view to increase versatility and operator controlFeatures: Premium Optics - 4C Lens Technology, 1/1/1/1 Optical Clarity and large 9.3 sq. inch viewing areaAll Day Comfort - Innovative X6 Headgear distributes weight, reduces pressure and optimizes balanceIncreased Productivity - External low profile grind controlProfessional Versatility - Optimized performance for all welding/cutting processes & environments5 year hassle free warranty4C Lens Technology is Lincoln Electric's proprietary liquid crystal display (LCD) that enhances the visible color spectrum of the display, which broadens the color range & hues in both light and dark states. This eliminates imperfections and color saturation to create the clearest view of the base material, arc & puddle, while reducing eye strain1/1/1/1 Optical Clarity that eliminates distortion, removes blurriness, and provides uniform shade & consistent shade at all anglesVariable 5-13 shade range and low profile, external grind control provides an expanded versatility and consistent indoor & outdoor performanceX6 Headgear features an adjustable and firm-fitting top head supports, rotatable front headband, strategically positioned rear headband, an orientation adjustment pin, and easy to use forward and backward adjustments to distribute weight, reduce pressure and optimize balanceExternal low profile grind control that makes switching between weld and grind modes easy, which increases productivity, prevents accidental activation and provides enhanced application versatility9.3 sq. inch (3-13/16 x 2-7/16) wide viewing areaReplaceable CR2450 batteries ensure increased battery lifeWelding helmet is hard hat and cheater lens compatible and provides enhanced outdoor performanceWelding Helmets Control Type: AnalogWelding Helmets Cartridge Size: 4-1/2" x 5-1/4"Welding Helmets Cut Mode: YesWelding Helmets Light to Dark Switch Time: 1/25,000 sWelding Helmets Magnifying Lens Holder: YesWelding Helmets Number of Sensors: 4Welding Helmets Quick Adjust Ratchet: YesWelding Helmets TIG Rating: DC 2 Amp; AC 2 Amp Included: (1)Welding Helmet(1) Helmet Bag(1) Bandana(5) KP2898-1 Outside Cover Lenses(2) KP3044-1 Inside Cover Lenses(1) Decal Sheet.