Machine was Ohmeda Medical / Infant Warmer System Model 4400 and the S/N was HCCL00693. Also has the patient temperature probe. Connector installed, the ribbon cable connects to the main control PCB board. GE Datex Ohio Ohmeda Infant Warmer System (IWS) Model 4400 and possiby others in the family such as 5000 3000 3050 3100 3150 3300 3500 4000 4300 - please check to be certain before ordering.