What is the data transfer rate of the StarTech.com SFP-1G-LX compatible module?

The data transfer rate of the StarTech.com SFP-1G-LX compatible module is 1 Gbps.

What is the maximum distance this SFP module can transmit data over single-mode fiber?

The maximum distance this SFP module can transmit data over single-mode fiber is up to 10 km (6.2 miles).

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StarTech.com Dell EMC SFP-1G-LX Compatible SFP Module - 1000BASE-LX - 1GE SFP 1GbE Single Mode Fiber SMF Optic Transceiver - 10km DDM

With 1000Base-LX technology, enjoy up to 1000Mbps data transfer rate over optical fiber cable
Gigabit Ethernet port for ultra-fast network speeds
Optical fiber cable compatible - Spans afar and provides speedy data transmission rates between servers and network components
For transmitting data at gigabit speed over hundreds of miles with little integrity loss, single-mode fiber optic is an ideal solution
SFP (mini-GBIC) is the single answer to all your desired and specified application execution needs
SFP (mini-GBIC) with optical network application/usage for reliability and maximum efficiency
Hot-swappable form factor for added reliability and dependability