A BT Dual-Band Wi-Fi Dongle is a USB device that allows your computer to connect to Wi-Fi networks over two frequency bands: 2.4 GHz and 5 GHz. This dual-band capability enables faster and more reliable wireless connections, as the 5 GHz band tends to be less congested and supports higher speeds, while the 2.4 GHz band offers better range and penetration.

The Windows driver for the BT Dual-Band Wi-Fi Dongle is software that allows your computer's operating system to properly communicate with and utilize the dongle's hardware. Without the correct driver, your PC may not be able to recognize the dongle, or it may not work correctly.