Features: Experience fast speed data transmission with 1.25G SFP LXSM1310 Opticals Module, offering blazings fast transfer rate of up to 1.25Gbps, for Gigabit Ethernet needs. for long Distances communication, this module use 1310nm single mode fiber, ensuring low signal loss and supporting distances up to 40km, making it for extensive fiber Opticals Networking. for IT professional and Networking administrators, this Opticals module for wide ranges of networking equipment, adhering to SFP and IEEE802.3z standards. for data centers, enterprise networking, or any setting requiring long ranges connectivitys, this module 2 fiber LC interfaces supports full duplex communication for enhanceds efficiency. with hot swappable feature and low power consumption, this Opticals module ensures easy installation and maintenance while optimizing energy use, reducing operational costs, and minimizing downtimes. Specifications: Materials: Metal Size:5.85cm/2.3inch Styles: 2KM, 20KM, 40KM, 80KM, 100KM, 120KM(optional) Package Includes: 1PC SFP Fiber Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.