Compliant with PCI Express rev 1.1 specification. Compliant with CSMA/CD protocol Supports for XP/Vista/7 32/64-bit, Server 2003 32/64-bit, for Linux 10 LED Data Transmission Indicators Supports ACPI Power Management, compliant to ACPI 2.0 Data Transfer Rate:10/100/1000 Mbps Chipset:Realtek RTL8111E External Ports:1 x RJ-45 Ethernet Port Host Interface:PCI Express (PCI-E) Fully compliant with IEEE802.1P, IEEE802.1Q, IEEE802.3 10Base-T, IEEE802.3u; 100Base-TX, IEEE802., 1000Base-T standards; Supports high-performance, low-processor-occupied PCI-E data bus; Supports 10/100Mbps full-duplex/half-duplex mode and 1000Mbps full-duplex mode; Supports Auto-Negotiation technology, automatically detects full-duplex/half-duplex mode, and automatically matches network speed; Support IEEE802.3x full-duplex flow control; Support VLAN TAG Ethernet tagged frames; Supports Gigabit Jumbo Frame sending and receiving Colour:Black Material:PCB+Metal+electronic components Package Contents: 2 * PCIE To RJ45 Network Card 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.