GLsun QSFP28 100G SR4/LR4/BLR4 Optical Transceivers are parallel 100Gb/s Quad Small Form-factor Pluggable (QSFP28 full-duplex) optical module to increass port density and save cost for total system. It offers 4 independent transmit and receive channels, each capable of 25Gb/s operation for an aggregate data rate of 100Gb/s on 100 meters of OM4 multi-mode fiber.