The Eastwood Large View Auto Darkening Welding Helmet features True Color Technology which allows a realistic color perception so you have a much clearer view of what you are welding. Durable and lightweight Impact resistant Nylon Multi adjustable head band Variable #4 to #13 shade Large viewing area Grind feature Optical Clarity 1/1/1/2 Magnifying Lens Compatible Grind mode allows you to quickly reshape tungstens, grind spot welds and more, without having to the remove the helmet. The large 3.9\" x 2.64\" (100mm x 67mm) view area assures accurate MIG or TIG welding without neck strain and adjustable head gear eliminate fatigue. Replaceable Li Mn battery with arc charging for up to 3 years usage. CE, ANSI and RoHs certifications. TRUE COLOR TECHNOLOGY The True Color Technology allows a realistic color perception so you have a much clearer view of what you are welding. COMFORTABLE HEAD GEAR This welding helmet has a 5 way adjustable headgear with sweat band for the perfect fit and comfort while welding. It will comfortably fit a head circumference between 21.6” – 24.8”. INTERNAL SHADE CONTROLS This Eastwood Auto Darkening Welding Helmet has infinitely adjustable sensitivity delay and shade adjustment. The main viewing area can be dimmed from shade 4 to 13, with Grind feature. Grind mode allows you to quickly reshape tungsten and grind spot welds. This helmet is compatible with a 2” x 4.25” plate size magnifying lens. Uses easily replaceable CR2450 batteries for power and has a low battery indicator to let you know when replacement is needed. Contents: (1) Welding Helmet (2) Outer Replacement Lens (1) Inner Replacement Lens Specifications: Color:  Gloss Black Cartridge Size:  4.5in. x 5.25in. (114mm x 133mm) View Window Size:  3.9in. x 2.64in. (100mm x 67mm) Optical Clarity:  1/1/1/2 Magnifying Lens Compatible:  (Plate size: 2” x 4.25”) Number of Sensors:  4 Shade Control:  Internal and step-less Variable Welding Shades:  Light state: DIN 4, Dark state DIN 5-9/9-13 with Grind Sensitivity control:  Variable Shade, Delay and Light sensitivity Power:  Replaceable Li-Mn & Solar Combination with arc charging for up to 3 years usage Light to Dark Switch Time:  1/25000 sec. Delay Control (dark to light):  0.15 sec. min. -0.8 sec.max TIG capability:  >2 amps Certification:  CE, ANSI, RoHS Operating Temp:  23-131 deg. F (-5-55 deg. C) Weight: 1.09lbs. (495g