New Cisco Compatible GLC-SX-MMD - 1000Base-SX SFP Transceiver by Dynamic Network Accessories GLC-SX-MMD - 1000BASE-SX SFP 850nm, 550M Connector Type: LC/PC multi-mode Type: Ethernet 1000Base-SX Data Transfer Rate: 1 Gbps Max Transfer Distance: 0.6 miles