Authentic vintage USRobotics Sportster 33.6K external faxmodem, Model 0648 (Part Number 00083908). Features classic RS-232 serial interface and RJ-11 telephone jacks, suitable for retro computing and legacy telecommunications / 3ComModel0648 / Sportster 33.6Part Number / MPN00083908TypeExternal FaxmodemMax Transfer Rate33.6 KbpsInterface / PortsDB25 Serial (RS-232), RJ-11 Phone / LineIncluded AccessoriesSerial RJ45 Console Adapter (Power Adapter NOT included)Testing StatusUntestedCondition: Pre-owned vintage cosmetic condition with minor exterior wear and light discoloration. Untested due to lack of compatible power supply. Power adapter is not included. Serial-to-RJ45 adapter attached. Item pictured is the one you will receive.