The RS232 over CAT5 extender can be used to extend RS-232 serial signals over a single CAT5e or CAT6 cable up to 1000 metres external power is not normally required but two power supplies are included should you experience problems. Specification Compatible with all RS-232 protocols Full-duplex data communication Sends RS-232 data at 230 kbps up to 1000m / 3300ft (1km) Pure hardware solution - real time data transfer no software conflicts No external power normally required Transfer data or files betweens PCs Single CAT5 or CAT6 cable required Contents Sender unit Reciever unit User manual PSU x 2 20cm DB9 to DB9 serial cable