The UGREEN 20204 AC650 Dual Band USB WiFi Adapter is a networking device designed to enable wireless internet connectivity for devices that lack built-in WiFi capability. Here are some key features typically associated with this type of adapter:

Dual Band Support: The adapter supports both 2.4GHz and 5GHz frequency bands, providing flexibility in connecting to different types of WiFi networks.

AC650 Speed: The "AC650" designation suggests that this adapter supports WiFi standards up to 802.11ac, with theoretical maximum speeds of up to 650 Mbps. However, actual speeds may vary based on network conditions and other factors.

USB Interface: It connects to a device via a USB port, making it compatible with a wide range of devices such as laptops, desktop computers, and even some compatible gaming consoles.

Compact Design: USB WiFi adapters like this one typically have a small form factor, making them portable and easy to use on the go.

Plug and Play: Many USB WiFi adapters are designed to be plug-and-play devices, meaning they can be easily installed and used without the need for additional drivers (though drivers may be required for optimal performance on some operating systems).

Compatibility: It should be compatible with various operating systems such as Windows, macOS, and Linux, depending on the drivers provided by the manufacturer.

WPS Button: Some adapters may feature a WPS (Wi-Fi Protected Setup) button for quick and secure connections to compatible routers.