A USB adapter offers one of the easiest ways to add Wi-Fi access to a device, whether you have a new desktop PC that lacks built-in Wi-Fi or need to improve the existing wireless connection in a desktop or laptop. A USB adapter is especially handy if you don’t want to (or are unable to) install an internal card yourself.After hours of testing dozens of models, we are confident that the Netgear Nighthawk WiFi 7 USB 3.0 Adapter (A9000) is the best USB Wi-Fi adapter for most people.