Interconnect cable typically ecg output from philips healthcare, ecg or ibp output from balloon pumps, maguire 257 multipliers and boom cabling systems to the ecg input of edwards vigilance monitors, philips healthcare and siemens ultrasounds or ~to~ the ecg or ibp input of balloon pumps. 1/4 in 2 ckt phone plug to 1/4 in 2 ckt phone plug.