X2-10GB-ER Wired Connectivity 10G Optical Transceiver , Copper SFP Module Cisco X2-10GB-ER Specifications: Genuine Cisco Fiber Transceiver Module X2-10GB-ER 10G Base 10-2266-02 1550NM Form Factor: SFP+ Device Type: Transceiver module Interface (Bus) Type: Plug-in module Connectivity Technology: Wired Application: 10GBASE-LR Data Transfer Rate: 10Gbps Wavelength: 1310nm Max Distance: 10km Fiber Type: SMF Connector: DuplexLC DDM: With DDM Operating Temperature: 0~70 C The Cisco 10GBASE X2 module offers customers a wide variety of 10 Gigabit Ethernet connectivity options for data center, enterprise wiring closet, and service provider transport applications. Hot-swappable input/output device plugs into an Ethernet X2 port of a Cisco switch or router to link the port with the network PN DESCRIBTION WS-G5484 1000BASE-SX Short Wavelength GBIC (Multimode only) WS-G5484 1000BASE-SX Short Wavelength GBIC (Multimode only) WS-G5486 1000BASE-LX/LH long haul GBIC (singlemode or multimode) WS-G5487 1000Base-ZX extended reach GBIC(singlemode) X2-10GB-LR 10GBASE-LR X2 Module X2-10GB-SR 10GBASE-SR X2 Module Pictures for reference: