A 1.25G SFP module, SM (Single Mode), Single Fiber, 60KM, 1310/1550, LC Connector, supports high-speed data transmission over single-mode fiber optics. It handles distances up to 60 kilometers, using one fiber for 1310 nm transmission and 1550 nm reception. Ideal for telecom, ISP, and enterprise networks needing reliable, long-distance data connectivity with minimal signal loss.