The AOpen AON-201 10M PCI Ethernet Adapter is a network interface card (NIC) designed for adding Ethernet connectivity to a computer via a PCI slot. It's an older model that supports a 10 Mbps (10BASE-T) Ethernet connection, which is slower compared to more modern 100 Mbps or 1 Gbps Ethernet adapters, but it may still be used in legacy systems or specialized applications. The Windows driver for this card allows your operating system to communicate with the network adapter and use it for network connectivity.