The Jackson NexGen is truly the next generation of auto-darkening for the welding specialist.The NexGen offers the flexibility of digital technology with the stability of analog to make the smartest auto-darkening filter on the market! With Jackson's Intellisense technology the NexGen can sense the most precise welding applications, such as plasma arc and extreme Low Amp Tig. Intellisense technology allows unit to detect welds less than 5 amps. Four redundant sensors in a staggered design eliminate blocked sensors. Unit has auto shut-off after 60 minutes in torch and grind modes. Weld mode has a 20 min. auto shut-off. Versatile cartridge fits in most 4" x 5" vertical windows. Replaceable lithium batteries. Smart View LCD for fingertip control information. Low battery indicator. 3N1 technology allows three modes of operation:weld (shades 9-13), grind (3), or torch (5). Soft touch control panel eliminates contaminates and protects from outside environment. Standard size outer cover plate. 9 square inches of viewing area and four sensors. Two year warranty. Made in the U.S.A.