H3C Compatible 40GBASE-ELR4 QSFP+ Optical Transceiver Module (SMF, 1310nm, 20km, LC, DOM) The QSFP+ module is designed for use in 40GBASE Ethernet throughput up to 20km over single mode fiber (SMF) using a wavelength of 1310nm via duplex LC connectors. This transceiver is compliant with SFF-8436. Optical modules transmit signals over optical fibers. Optical transmission features low loss and is fit for long distance transmission. The. Maxlink ML-S31D-20-H3C is a 1. The SFP module supports monitoring (DDM). 4mm Package Contents: 1 x Module Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little. H3C SFP-GE-LX-SM1310-20 Compatible 1000BASE-LX/LH SFP Transceiver Module (SMF, 1310nm, 20km, LC, DOM) Part Number SFP-1G-LX (20km) Vendor Name QSFPTEK Form Factor SFP Data Rate 1.