product features : Bus Type: M.2 A/E Key 2230 Integrated 10/100/1000M transceiver High Performance 1000BASE-T Ethernet Controller Card Backward compatible with 10/100BASE-T network 10/100/1000Mbps data rate auto-negotiation operation Compatible with existing CAT-5 UTP cables Fully compliant with IEEE802.3, IEEE802.3u, IEEE802. Supports half/full duplex mode and 802.3x flow control Support IEEE802.1P Layer2 priority encoding Supports IEEE 802.1Q VLAN tagging Transmit/receive on-chip buffer support Supports jumbo frames of 9K bytes detection and automatic correction operations Support power down/link power saving Wake-on-LAN and Remote support Standard and low profile chassis supported 1 RJ45 Gigabit LAN port Chipset: Realtek RTL8111F System Requirements: DOS, Win 7/Win 8/Server 2008/Win 8.1/Server 2012/2016, Win 10 32- 64bit, Linux There is an available M.2 A+E KEY slot on the motherboard size:22x30MM Material:PCB colour:Green Package Contents: 3 x M.2 A+E RTL8111F-Main Card 3 x RJ45 terminal 3 x CD-Drive Disc 3 x Network Terminal Cable 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. M.2 A+E RTL8111F Gigabit Ethernet adapter, supports 10/100 / 1000Mbps full-duplex/half-duplex adaptive network. It supports sending gigabit super long frames, and can provide bidirectional data transmission of up to 1000Mbps. Use it to implement Gigabit networking to the desktop and improve network performance. Backwards compatible with 10/100BASE-T systems, so it can easily be plugged into almost any existing network using a CAT-5 cable. It is suitable for multiple market segments and emerging applications such as desktops, workstations, servers, communication platforms and embedded applications.