4 Pack 1.25G SFP Network Transceiver Module, 1000Base-LX Single Mode, 1310nm SMF, 20km, for Router, Network Card, Switch, Firewall etc

Widely compatible: The gigabit networks transceiver are supported up to 1.25 gigabit data rate and compatible with mainstream switch vendors for Mikrotik, Netgear, Ubiquity, DLink etc. (The SFP are not recommended for HP and Aruba products). The fiber module also works well with switch, router, media converter and more gigabit SFP optic ports.
^^ 1000Base-LX/LH SFP: Gigabit Single Mode SFP Module support 1.25 Gb/s data rates, 1310nm wavelength, SMF; Duplex Dual LC interface connected to Single-mode (OS1/OS2/OS3) LC/UPC fiber cable, up to 20km ( 12.4 mile) ^^ Wide
Temperature Range: the SFP transceiver support 0~70 Operating temperature ^^ Fast and
Convenient connection: the SFP supports hot swappable, which just need plug and play for fast connection with LC-LC Single-mode fiber path.
^^ Premium After-Sales Service: We offer a 24-month warranty to ensure the best service for you. If you encounter any issues, damages, or find the product unsuitable, We provide comprehensive after-sales support and will strive to resolve your concerns promptly.