Adaptec AHA-2940AU KIT. Data transfer rate: 20 Mbit/s. Bundled software: EZ-SCSI 5.0 software (for use only with Windows 95, 98, ME, or Windows NT 4.0 operating systems), Data link protocols: SCSI-1, SCSI-2, SCSI-3, UltraSCSI, Platform: For Desktop PCs and Servers