While the majority of 1Gb environments will use RJ-45, there are some instances where cable paths need to go longer distances. SFP SX transceivers support distances up to 550 meters and SFP LX transceivers support distances up to 10 kilometers.

Specification

Product
Product id	483842
Brand	Lenovo
Partnr	90Y9424
EAN/UPC code	2002352479006
Network
SFP transceiver type	LX
Technical details
Cable type	Single-mode
Performance
Maximum data transfer rate	1000 Mbit/s
Interface type	SFP
Maximum transfer distance	10000 m
Fiber ports quantity	1