Cisco 4x10Gbps Multi-Rate QSFP+, ER - For Data Networking, Optical Network - 4 x MPO-12 10GBase-ER Network - Optical Fiber - 1260 nm, 1260 nm, 1565 nm, 1365 nm Wavelength - Single-mode - 10 Gigabit Ethernet - 10GBase-ER - 40 Gbit/s - 25 km Maximum Distance - Plug-in Module: