10GBase-ER SFP+ - SM LC 40 km. 10GBASE-ER fiber transceiver adds reliable 10Gb over fiber - StarTech.com lifetime warranty on all StarTech.com SFP modules - Maximum Transfer Distance of 40 km (24.8 mi) - SFP+ transceiver module complies with MSA industry standards - LC fiber SFP has a low power consumption of < 1.6 W - Fiber SFP+ module uses a cost-effective cabling alternative to fiber - Hot swappable with fiber optic modules.