The Telsey 802.11g Wireless USB 2.0 Adapter is a device that allows your computer to connect to Wi-Fi networks using the 802.11g wireless standard. This adapter typically connects to your computer via a USB 2.0 port and is used for providing wireless network access to PCs or laptops that may not have built-in Wi-Fi capabilities or whose internal wireless adapters are not working.

To use this device on a Windows computer, you need to install the driver that enables the operating system to recognize and communicate with the wireless USB adapter. The driver is essentially a piece of software that facilitates communication between the hardware (the Telsey adapter) and the operating system (Windows).