TP-LINK TL-WN823N is a wireless USB adapter that allows you to connect your computer to a wireless network and access the Internet. It is compatible with Windows 8.1, Windows 8, Windows 7, Windows Vista, and Windows XP. With speeds of up to 300Mbps, it is ideal for online gaming, video streaming, and downloading large files. The adapter also features advanced security protocols to protect your data from unauthorized access. It supports both WPS (Wi-Fi Protected Setup) and traditional password-based authentication methods, making it easy to connect to a secure wireless network.