This is a NETGEAR 54 Mbps Wireless PCI Adapter, model WG311v3. It is a network card designed to be installed in a computer's PCI slot to provide wireless connectivity. The adapter uses the IEEE 802.11b/g Wi-Fi standard and supports a data transfer rate of up to 54 megabits per second.
The WG311v3 allows a desktop PC to connect to a wireless network, which is useful for accessing a home wireless router or office network. It was a popular choice for providing wireless internet access during its time. NETGEAR released a user manual for this model in February 2007. The product has since reached its end-of-life status, but some vendors may still offer it for sale. The device is compatible with various Windows operating systems, such as Windows XP, Vista, and 7, but may have driver-related issues with newer operating systems like Windows 10.