Long product name StarTech.com GLCLHSMDST network transceiver module:StarTech.com Gigabit Fiber SFP Transceiver Module - Cisco GLC-LH-SMD Compatible - SM/MM LC - 10km / 550m - 1000Base-LX/LH - Mini-GBICMarketing text StarTech.com GLCLHSMDST network transceiver module:This StarTech.com Gigabit fiber SFP is engineered to deliver reliable network connections. Built to exacting specifications and fully tested to ensure maximum performance, this high-quality fiber transceiver module can be installed into Cisco® switches and routers that support the GLC-LH-SMD transceiver module, as well as other major brands of networking equipment.It provides a dependable and cost-effective way to add, replace or upgrade the ports on your 1000Base-LX/LH networking equipment, and it's backed by a lifetime warranty.Built for reliable network performanceThis single-mode/multimode SFP