COHERENT 40GBASE-LR4 Lite QSFP+ Optical Transceiver Module - For Data Networking, Optical Network - 1 x LC 40GBase-LR4L Network - Optical Fiber - 1310 nm Wavelength - Single-mode - 40 Gigabit Ethernet - 40GBase-LR4L - 41.20 Gbit/s - 2 km Maximum Distance - Hot-pluggable: