... output,consumption 2W3.Internal or external power choice.4.Multi-mode 2KM, signal-mode 20KM, 40KM, 60KMCommunication ... , point to point or multi-pointDirection controlAdopt automatic send data control , auto distinguish and control data transfer directionBand rate0-120Kbps ... 1310nm Electricity port transmissionRS-232 port 15MOptic port transmission Multi-mode 2KM, signal-mode 20,40,60KMLoading point ...