This Star Tech.com Gigabit fiber SFP is engineered to deliver reliable network connections. Built to exacting specifications & fully tested to ensure maximum performance, this high-quality fiber transceiver module can be installed into Cisco switches & routers that support the GLC-SX-MMD transceiver module, as well as other major brands of networking equipment. This 1000 Base-SX SFP delivers Gigabit connectivity over multimode fiber cable, with a range of up to 550 m (1804 ft. ). It provides a dependable & cost-effective way to add, replace or upgrade the ports on your networking equipment.