Features: brand new and high quality Complies with pci-express revision 1.1. 1 lane pci-express interface (x1). Supports standard and low profile chassis. One high-performance 1000BASE-T Ethernet controller card. for 10 / 100BASE-T networks. Supports jumbo mount at 9K bytes. 10/100 / 1000Mbps data rate AUTO negotiation OPERATION. for existing CAT-5 UTP cabling. Fully compliant with IEEE802.3, IEEE802.3u, IEEE802.3ab. Supports half / full duplex mode and 802.3x Flow Control. Supports IEEE802.1P Layer2 priority encoding. Supports IEEE 802.1Q VLAN tagging. Supports power saving off / link. LAN wake-up and remote wake-up function. 4 Gigabit RJ45 lan ports. System Requirements:Windows®98se / me / 2000 / XP / 2003 / Vista /Win7/2008/Win8/Win8.1/Win10 (32/64 bit). Specifications: Chipset:Intel 82576 Ethernet Controller Port number: 4 x RJ-45 Standard: IEEE802.3, IEEE802.3u, IEEE802.3ab standards Data speed:10/100/1000 / Mbps Interface:PCI for express 1X Size:approx. 16x24cm/6.3x9.45in Package Includes: 1PC x Network Card 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.