M.2 A+E RTL8111F Gigabit Ethernet Adapter, supports 10/100/1000Mbps full-duplex/half-duplex adaptive networking. It supports gigabit super long frame sending and can provide bidirectional data transmission up to 1000Mbps. Use it to implement Gigabit networking on the desktop and improve network performance. Backward compatible with 10/100BASE-T systems, so it can be easily plugged into almost any existing network using a CAT-5 cable. It is suitable for multiple market segments and emerging applications such as desktop computers, workstations, servers, communication platforms, and embedded applications. Product Features: Bus Type: M.2 A/E Key 2230 Transceiver Built-in 10/100/1000M High-performance 1000BASE-T Ethernet controller card Backward compatible with 10/100/1000M 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