Features: M. 2AandE KEY RTL8125B 2.5G Single Port Multi Gigabit Networking Adapter Combining IEEE802.3 compatible media access controllers with Ethernet transceivers to 10/100Mbps Ethernet IEEE802.3u specification, IEEE802.3ab1000Mbps Ethernet specification, and IEEE802.3bz 2500Mbps Ethernet specification. It also provides high-speed transmission through CAT5e UTP cable or CAT3 UTP (only 10Mbps) cable5G Networking speed provides a faster Networking connection experience. M. AandE Networking card adapter upgrades laptops or desktops to 5G networkings without the need to replace the entire Networking card. Suitable for computer users who require high-speed Networking connecting, such as gamers, video editor, and remote office workers. Specifications: Networking type: M.2 AandE Gigabit Ethernet Adapter Main controller: RTL8125B Bus slot: M.2 AandE Key Bus mini pcie Transmission medium: 1x 2.5G RJ45 Transmission rate: 2500Mbps 2.5G/1000/100Mbps Networking mode: Supports 2.5G and 1G modes Networking topology: Supports IEEE1588v1, IEEE1588v2, Support:IEEE802.3az-2010 Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1PC M.2 AandE Gigabit Ethernet Adapter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.