Buy a Cisco SFP-10G-LR 10GBase-LR SFP+ Transceiver Best Service - worldwide fast shipping at www.adsii.ca/cisco-products/cisco-transceiver/cisco-sfp-modules/sfp-10g-lr.php Technical Detail Manufacturer : Cisco Manufacturer Part : SFP-10G-LR Product Description : Cisco - SFP+ transceiver module - 10 Gbps Device Type : SFP+ transceiver module - LC/PC single mode Form Factor : Plug-in module Cabling Type : 10GBase-LR Data Transfer Rate : 10 Gbps Optical Wave Length : 1310 nm Data Link Protocol : 10 Gigabit Ethernet Max Transfer Distance : 6.2 miles Dimensions (WxDxH) : 0.5 in x 2.2 in x 0.4 in Weight : 2.6 oz Manufacturer Warranty : 90 days warranty