When John Atanasoff constructed the first semi-electronic digital computing device in 1939, he never could have imagined that over sixty years later, Belkin components would carry every SCSI cable imaginable. This Micro DB50 male singled ended Pro Series SCSI Active External Terminator can be used with SCSI devices, such as a scanner, which have a Micro DB50 female port. Belkin active terminators provide the clearest data signal maximizing signal integrity.