Cisco SFP-10G-SR-S= 10GBASE-SR SFP Module, Enterprise Class

"Cisco SFP-10G-SR-S Module (S-Class) The Cisco 10GBASE-SR module supports a link length of 26 meters on standard Fiber Distributed Data Interface (FDDI)-grade multimode fiber (MMF). Using 2000 MHz*km MMF (OM3), up to 300-meter link lengths are possible. Using 4700 MHz*km MMF (OM4), up to 400 meter link lengths are possible. SFP-10G-SR-S does not support FCoE. "