Open-Box, new item (incomplete, The side adjusters are missing from the headband of the welding mask. Please refer to the attached picture for details.)Large field of view screen100x93mm large and high field of view, bring comfort to the welding machine.The optical index is 1/1/1/2, which can provide the best visual effect and effectively reduce visual fatigue at all stages of the welding process.Excellent eye protection4 independent shadow filter sensors, when the arc is touched, the automatically dimming filter will change from bright to dark in 1/30000 second. In the event of a power failure, it can still protect the welder from ultraviolet and infrared damage.Multi-purpose DesignHerocut welding mask equipped with sensitivity and delay settings,suitable for TIG/MAG / MIG/ MMA and ARC welding processes.In order to obtain better visibility ,the brightness level of the filter is DIN4, from dark to bright The state time is within 0.1s to 1.0sWide applicationSuitable for