The EH103 Wireless G USB Adapter is a device designed to allow your computer to connect to a wireless (Wi-Fi) network via a USB port. It's commonly used to enable wireless connectivity for desktops, laptops, or other devices that do not have built-in wireless capabilities. The "G" in the name refers to Wi-Fi 802.11g standard, which is a part of the Wi-Fi family that offers speeds up to 54 Mbps (though it has been largely superseded by newer standards like 802.11n and 802.11ac).

To use this adapter, you will need the appropriate Windows driver that allows your computer's operating system to communicate with the adapter, enabling it to connect to a wireless network.