***** **********Best Quality Guranteed. *****Compatibility- compatible for Cisco SFP-10G-LR, please contact us, any product quality and compatibility issues*****Main Specs - 10Gb/s rate, single-mode, duplex LC connector, 1310nm wavelength, up to 10km transmission distance, DDM Support*****Application - used in fiber switches, routers, NIC, server or other fiber optic equipments with 10Gb SFP + ports*****30 days Free-Returned, 3 years Free Warranty and lifetime technology support*****Packing List - Pack of 4 10GBase-LR SFP+ Transceivers