Item	Detail
Single-mode Single Fiber	Requires matching wavelengths (1310/1550) for two fibers to transmit data between A and B ends.
Single-mode Dual Fiber	Uses two fibers with the same wavelength for bidirectional data transmission between two ends.

BIAZE Optical Module, Gigabit SFP Single-Mode Dual-Fiber 20km, LC Interface Multi-Core 1.25G+10G Compatible with Huawei/Huaxing/Pulin/Ruijie/ZTE And Other Domestic Brands

Product Description