The Largest Viewing Area and the Best Color Accuracy. SÜA True Color Filter offers the best viewing experience while welding with a grey, high-definition shadow, that provides a better color accuracy than the one found in other "True Color" filters with a purple or green shade. Our 4" x 4" = 16 square inches Viewing Area is the largest in the market. PERIOD. The external looks of this helmet were beautifully designed to fit the largest welding filter and the mirror-like effect on the filter looks better than the common purple or green on the rest of the options found in the market. All the controls are located outside the helmet for an easier and more ergonomic adjustment of the darkening parameters. Shade Range: DIN 4 to 13 and Grinding Function. Can be used for MIG, TIG, Stick, Plasma and Grinding processes. Made of high-impact nylon polyamide, complies with CE EN175B, B class. It comes fully assembled and with installed battery, ready to weld out of the box. All SÜA Vector helmets come with our newest most comfortable headgear, with redundant and adjustable head support and swiveling joints for a perfect and ergonomic fit. Additional accessories included: Extra battery, Internal and external filter protection screens, Extra Sweatband. Please check all the pictures for more information. Cartridge size: 4.5” x 5.2” x 0.35” Optical class: 1/1/1/2 Viewing area: 4”x 4” Arc sensors: 4 (Independent) Shade State: DIN 4/5-8/9-13 Stepless control Grinding function: Yes Sensitivity: Stepless variable UV/IR protection: Shade DIN16 (Permanent) Power supply: Solar Cell & CR2450 Lithium Battery  Low battery indicator: Yes, Led light Operating temp: 14 °F to 140 °F (-10 °C to 60 °C)