StarTech Gigabit Fiber SFP Transceiver Module Delivers reliable Gigabit Ethernet connections for 1000Base-SX compliant networks 100% Cisco compatible, equivalent to GLC-LH-SMD SFP form factor, Single mode / multi-mode, fibre optic Supports speeds upto 1250 Mbps wave length: 1,310 nm, Supports distances up to 10 km Fiber Optic LC Duplex female