BioPac MP150 to ActiveTwo trigger cable, 15 ft, nine 2 mm tip plugs to DB37M. Trigger interface cable to connect digital outputs of BioPac MP150 to ActiveTwo digital trigger input port. 15 ft length. Nine 2 mm tip plugs on one end (black = ground; red = bits 0-7) and 37 pin D sub male on the other end. Bits 0-7 and ground labeled at connector end. ActiveTwo label on DB37 end.