8.5G 1000base-lx/lh SFP 1310nm 20KM SFP Optical Transceiver Module High Quality with CE,RoHs, ... ,ISO certificate. FeaturesHot-PluggableSingle +3.3V Power SupplyLVPECL Data Interface850nm/1310nm/1550nm VCSEL/DFB/EML, SM/MM Fiber OptionalEye Safety, Designed ... , UPS and so on. 8.5G 1000base-LX/LH SFP 1310nm 20KM SFP Optical transceiver