This item is an IBM 16-Bit AT (ISA) Fast SCSI-2 Adapter. Connectors: Internal: 50-pin shrouded SCSI-2 with built in termination power. External: 50-pin high-density SCSi-2 with termination power. Memory: 8KB ROM. Minimum System Requirements: DOS Version 3.3, or WIN 3.1, or Windows 95, or OS/22.1, or OS/2 Warp. This adapter comes in the original box and includes adapter, SCSI ribbon cable, user's guide and software.