[(10GBase-LR SFP+ Transceiver, SMF)]: Gigabit Ethernet Fiber transceiver module, 10 Gigabit Ethernet Single Mode SFP+ Module, 10 Gb/s, 1310nm wavelength, Duplex Dual LC, SMF, operates on single-mode (OS2/OS3) LC/UPC fiber cable spans of up to 10km ( 6.2 mile) in length.