Wondering why your computer cannot catch up to speed with your ISP? its because of the hardware on your system! It's time to upgrade your home and office network infrastructure with existing cables. Easy to use Just need to plug the Ethernet card into the corresponding PCIe slot, install the appropriate driver and then enjoy the 2.5Gbps data transfer rate There is also physical to show connection activity. One green light blinking and one green light on indicates 2.5G connection status.One blinking green light and one constant blue light indicates 1G connection status port: Single Port please place the order carefully which you need 2.5Gbps PCI Express Gigabit Ethernet Card Material: plastic+metal colour: black Package Contents: 1 x Gigabit Card 1 x Baffle 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.