A Finisar SFP-10G-LR is a long-range 10 Gigabit SFP+ transceiver for single-mode fiber (SMF), compatible with the Fortinet FG-TRAN-SFP+LR, meaning it works in FortiGate models like the 500D, 7060E, 7040E, and 7030E for up to 10km connections, offering a cost-effective, fully functional, and tested alternative to OEM parts. It uses a 1310nm laser, has a duplex LC connector, supports Digital Diagnostics Monitoring (DDM), and performs identically to original Fortinet modules.