The Rosewill Gigabit PCI Lan Card RC400-LX is a networking card that provides high-speed Gigabit Ethernet connectivity to a computer. With a form factor of PC Card Type I, this unit is designed to fit into a PCI port for easy installation. Featuring a single RJ-45 port, it offers reliable and efficient network access. Manufactured in China, this sealed NOS (New Old Stock) card is a reliable and cost-effective option for enhancing your computer's networking capabilities.