Info on Old Jackson EQC Helmet

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I got an old Jackson helmet with an EQC lens. Does anyone have any info on this? It's got two push buttons inside that I originally assumed were on/off, but one seems to turn the AD feature on, and the other I'm thinking is a grind mode, but it changes the lens shade to blue instead of green. Is this a grind or torch mode, or more a different welding shade?John 3:16(2) Miller Pheonix 456(2) Millermertic 252Dynasty 210DXHobart 210MVPDoringer D350 SA Cold SawScotchman 350LT Cold SawWebb 10x50 MillWebb 15x40 LatheGeka Bendicrop Ironworker