This is an 8 channel 1W LGX CWDM Mux and Demux that operates over wavelengths 1471nm - 1611nm and it includes Express and Monitor ports and duplex LC connectors. This unit can be used as either a multiplexer or de-multiplexer (mux/demux), and is a plug and play system. All of our mux/demux products are 100% compliant and provide a cost effective solution for your network upgrade needs. With our certification test program, we guarantee your product will work correctly the first time.