Using 2.5G network card chip, it has low power consumption, low latency, more stable transmission, and is not easy to cause packet loss and distortion.     The PCIe to 2.5G network adapter supports data transfer rates up to 2.5 Gbps. Combined with the new 2.5GBase-T technology, it is 2.5 times faster than typical Gigabit adapters.     The 2.5G network adapter supports three speeds: 2.5Gbps, 1Gbps and 100Mbps.     Fits any PCI Express x1, x4, x8 or x16 slot.     The 2.5G network adapter supports Windows 10, Ubuntu 19.04 or later operating systems.PCI Express 3.1: 5GT/s supports x1 width (Lane).Supports PCI Express x1, x4, x8 or x16 slots.Integrated MAC/PHY supports 10BASE-Te, 100BASE-TX, 1000BASE-T and 2500BASE-T 802.3 specifications.RJ45 connection: Use CAT5e, CAT6 or CAT6A compatible cables up to 100 meters.          IEEE 802.3 auto-negotiation     IEEE 802.3x and IEEE 802.3z compliant flow control support with software controllable Rx thresholds and Tx pause frames     Multi-queue: 4 Tx and Rx queues per device     Tx/Rx IP, SCTP, TCP and UDP checksum offload (IPv4 IPv6) capabilities     Energy Efficient Ethernet (EEE): IEEE 802.3az enabled to reduce power consumption, supports 10GBASE-Te (EEE at 10Mbps). Note: Enabled for 2.5, 1GBASE-T and 100BASE-TX in a future release.     Active State Power Management (ASPM)     Full wakeup support     ACPI register settings and power down function support D0 and D3 states     MAC Power Management Control     Power Management Protocol Offload (Agent)     TCP/UDP, IPv4 Checksum Offload (Rx/Tx)     Transport Segmentation Offload (TSO) (IPv4, IPv6)     low latency interrupts     Windows Receive Side Scaling (RSS): Up to four queues per port.     Supports packets up to 9.5KB (jumbo frames): Enables faster, more accurate data throughput.     Operating temperature 0 °C to 55 °C (32 °F to 131 °F)     Storage temperature -40 °C to 70 °C (-40 °F to 158 °F)     Maximum storage humidity: 90% non-condensing relative     LED indicators LINK (steady) and ACTIVITY (flashing)     System Requirements: Windows 10/Ubuntu 19.04 or later     Colour:black     Material:PCB     Size: 65.3x44.5mm          Package Contents:     1 x Network Card     1 x Short Iron Piece          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.