Network card/adapter, internal, data transmission Multi-Mode Fiber - Multimode duplex fiber optic transceiver module - Multimode SFP+ module with LC connector - Data rate: 1.25 Gbit/s, TX wavelength: 850 Nm RX wavelength: 850 Nm - Up to 550 m range - Transmission: Duplex - Pack of 20 The optical 1 Gbps multimode module is a duplex transceiver that transmits at speeds of up to 1.25 Gbps over distances of up to 550 meters.