Huawei SFP-GE-LX-SM1310 is Optical Transceiver. Its a Single-mode Module. SFP-10G-LR Specification Product Code SFP-GE-LX-SM1310 Transceiver form factor eSFP Transmission speed 1 Gbit/s Center wavelength (nm) 1310 Standard compliance 1000base-LX/LH Connector type LC Applicable cable and maximum transmission distance Single-mode fiber: 10 km Transmit power (dBm) -9.0 to -3.0 Maximum receiver sensitivity (dBm) -20.0 Overload power (dBm) -3.0 Extinction ratio (dB) 9 Operating temperature 0C to 70C (32F to 158F) Net Dimension(D x W x H mm) 110 x 70 x 37