Once you have this ID, you can search Google for that specific ID plus "driver download." For example, searching "VID_0BDA PID_8176 driver Windows 7" will lead you directly to the Realtek RTL8188CUS driver, which is the correct software for your specific stick.
Since the sticker on your device probably doesn't tell you the manufacturer, Windows 7 has a built-in tool to help you identify the specific chipset inside your adapter. This is the most reliable way to find the exact driver you need. 802.11 n usb wireless lan card driver for windows 7
Sometimes, connecting to the internet via an Ethernet cable (wired) and letting Windows 7 "Check for Updates" in the Device Manager will automatically find the driver for you. Once you have this ID, you can search
However, "802.11n USB Wireless LAN Card" is not a specific brand. It is a generic identifier used by dozens of manufacturers. Most of these affordable adapters utilize chipsets from Realtek, Ralink, or MediaTek. Because the branding on the outside of the USB stick is often vague or non-existent, finding the correct driver is rarely as simple as visiting the manufacturer's website. Sometimes, connecting to the internet via an Ethernet