This is a 2/4 channel CWDM/DWDM mux/demux with a LC connector. It measures 19 inches, and is rack mountable. This mux/demux can bundle, and respectively unbundle, several fiber optic signals into a single fiber optic circuit. This OADM supports wavelengths between 1260nm and 1620nm, and can be customized among a variety of CWDM channels. This product includes an express port. 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.