Gigabit Ethernet SFP Mini-GBIC Transceiver 3 Year Warranty when purchased from the manufacturer or authorized reseller SFP standard form factor Compliant with SFP Transceiver MSA specifications Compatible with the Cisco GLC-LH-SM transceiver Supports hot-plugging Data transfer rate: 1000 Mbps One 1000Base-LX single-mode Fiber LC duplex port Distance support: up to 20 km (12.4 mi.) Wavelength: 1310 nm