With the adequate production capacity and total quality management,a wide variety of CWDM SFP transceivers and CWDM xfp transceivers are available with different rates (1.25G and 2.5G ) and transmission distance(from 40km to 120km). Details about one modle of ATOP's CWDM SFP transceiver here. AP-SC49125-3CxL80 1.25 Gb/s RoHS Compliant CWDM Pluggable SFP Transceiver Product features Up to 1.25Gb/s bi-directional data links Hot-pluggable SFP footprint Uncooled DFB laser transmitter in 8 possible CWDM wavelengths Duplex LC connector RoHS compliant and Lead Free Up to 80 km on 9/125 Metal enclosure for lower EMI Single 3.3V power supply Low power dissipation