Kelsey Hayes Trailer Brake Controller + Extras.  Controller model 81740, p/n 107005.  Includes mounting bracket and brake hardline with tee.  Also included is under- hood adjustable resistor with wiring & in-line fuse, rear 7-pin receptacle connector with 16 feet of 2- conductor wire for trailer electric brakes and wire pigtails for trailer turn signals & running lights.  Removed from Oldsmobile in 1990's and stored indoors since.  Untested.  Good condition.