A 1.25G SFP module, SM (Single Mode), Single Fiber, 100KM, 1310/1550, LC Connector, supports long-distance data transmission up to 100 kilometers over single-mode fiber optics. It operates at 1.25 Gbps, transmitting at 1310 nm and receiving at 1550 nm wavelengths, ideal for telecom and enterprise networks needing reliable connectivity with minimal signal loss.