LINK3025-1 Features: -1840 Series helmet.-Continuously variable control - for shade and sensitivity.-9-13 Shade control.-Sensitivity - adjustable for different welding environments.-Delay - adjustable from dark back to light state.-Light weight.-Grind mode - great for weld prep or post-weld clean up activities.-Magnifying "cheater" lens capable.-Hard hat adapter capable.-Extra cover lenses enclosed - (2) inside and (5) outside.