... color for your choose; Different designs for your reference Fully Automatic Welding Helmet Technical Parameter: DX-400NDX-500DDX-400SOptical Class:1 / 2 / ... shade, 9 ~13Shade Control:Internal,VariableExternal,VariableExternal,VariablePower On/Off:Fully AutomaticSensitivity Control:Low-High, by switch buttonLow — High, by infinitely ...