The Linksys WUSB6300 Dual-Band AC1200 Wireless USB 3.0 Adapter in black is a high-speed wireless adapter that allows you to easily connect your devices to a wireless network. With a maximum downstream data rate of 867Mbps, this USB adapter provides fast and reliable internet access. It supports various wireless standards including 802.11a, 802.11b, 802.11n, 802.11ac, and 802.11g, ensuring compatibility with a range of devices. The dual-band feature helps avoid congestion and interference, while the USB 3.0 port provides quick and easy connectivity to your computer or other devices.