1.25Gb/s SFP Optical Transceiver Module 550m, 10km, 20km, 40km, 80km, 120km are available wavelength: 850nm, ... 1310nm, 1550nm 1.25Gbps SFP Optical Module, 40km Reach FeaturesData-rate of 1.25Gbps operation1310nm DFB laser ... ,ISO certificate. 1000BASE-LH 1310nm 40km SFP Transceiver, SFP Optical module