Dimmer Control Switch. Color: Black. Pole/Throw: Single/Double. Action: (ON) - OFF - (ON). Mounts in Blue Sea Systems' waterproof panels. Legend - BRIGHT and DIM. Use Contura switch mounting panels and accessories. WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.