【AUTO-DARKENING DESIGN】This welding hood auto darkening comes with the 3.62" x 1.65" clear visor viewing area, it can switch from light to dark in 1/25000 sec. 【CLEAR VIEWING】The 1/2/1/2 optical class of the welder mask provide better clarity. It is designed with high quality liquid crystal and optical coating to protect your eyes, suitable for MMA, MIG, MAG/CO2, TIG and Plasma Welding. 【MULTIPLE SETTINGS】 Welding helmets built-in sensitivity and delay settings to adapt to different task, you can quickly adjust the shade state turning the external knob. 【LONG BATTERY LIFE】This welding shield is powered by lithium battery, as well as fitted with solar panel technology. Tips: Please place the welding helmet in a dark environment when not in use to prevent battery life from being depleted. 【STURDY HEADGEAR】Thanks to weighting only 2 lb and sturdy headgear with adjustable top and rear bands, our auto darkening welding helmet can provide a more comfortable experience., Weight: 1.5652820602 pounds, Manufacturer: DEKO