Fully automated power ON/OFF 1/25.000sec)Adjusted shade at the turn of a shade knobHigh performance solar cells and 2 built-in 3V lithium batteries as power back-upNo change of battery is required. Battery has a lifetime of more than 2 yearsThe ultra-high performance of UV/IR Auto-Darkening filters provide full protection for the users eye & face against UV/IR radiationSuitable for MIG, TIG, ARC, PLASMA WELDING, PLASMA CUTTINGFilter size: 110x90x9mmFull conformity with related DIN, EN safety standards and ANSI Z87.1-1989 standardsDark-to-clear delay adjustment (0,2-0,8s)Special headband mechanism for comfortable workingSensitivity-setting switch to high/low position