2x4 Variable Shade 8-13 Auto-Darkening Welding Lens. Solar Powered and Rechargeable. NEVER BUY BATTERIES AGAIN!! ALERT!! Best feature: Can be locked into passive mode as well as auto-darkening mode!!  This 2x4 Variable Shade 8-13 auto darkening welding lens features TRU color lens technology. Liquid crystal display passes more true color through the lens in both light and dark states to create the clearest view of the weld puddle. Can be used for "ALL" welding processes. High quality sensors to ensure proper operation during TIG, MIG, STICK and FLUXCORE welding. This lens has "Cut Mode" which provide shades 5-8 to be used during oxy-fuel or plasma cutting and gouging. Also includes a Grind Mode for easy transition between welding and grinding. Standard 2" X 4.25" lens that's 5/32" thick fits all 2x4 welding hoods, pipeline helmets and all "Pancake" style welding shields. Never seen before feature allows the lens to be locked into passive mode and simultaneously change lens darkness to accommodate high or low arc exposure levels. Welding lens is RECHARGEABLE and SOLAR POWERED. NEVER BUY BATTERIES AGAIN!! This lens will last for years. Lens will fully charged in 1hr. With 80hrs of continous welding time per charge. Low battery indicator light to alert the welder when a charge is needed.