SFP slot, supports the following transceivers: Mini GBiC 1000SX multi-mode, 1000LX single-mode, 1000BX single-mode WDM Layer 2 Features: IEEE 802.3x Flow Control - IEEE 802.1q VLAN Supports receiver scaling (RSS, supports IPv4, IPv6 protocols Support 9K jumbo , support checksum offload Network Type: 1000Base-/1000Base-LX, Main Controller: For I210AS Bus card slot: mini PCIe Transmission medium: 1 x SFP fiber interface Transmission rate: 1000Mbps Network topology: IEEE802.3z 1000BASE-X Gigabit Ethernet IEEE 802.3x Full Duplex and flow control IEEE 802.3ad Link aggregation for parallel links IEEE 802.1Q VLAN, IEEE 1588 IEEE 802.3az - Energy Efficient Ethernet (EEE) Features: Support PXE, DPDK, , iSCSI, FCoE, Jumbo , etc. Colour:black :PCB Package Contents: 1 x Main Card 1 x Card 1 x CD 1 x 10-Pin Cable 1 x SATA Data Cable 1 x Half Height Bezel Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.