The Alfa AWUS1900 is a high-gain dual-band wireless USB adapter that is designed to provide a reliable and powerful wireless connection. It features four external antennas, which can be adjusted for optimal signal strength, and supports both the 2.4 GHz and 5 GHz frequency bands. The AWUS1900 is compatible with IEEE 802.11a/b/g/n/ac standards and supports wireless data transfer rates of up to 1900 Mbps.

The AWUS1900 is built with a Realtek RTL8814AU chipset, which is known for its stability and high performance. It is compatible with various operating systems, including Windows, Mac, and Linux. The adapter also supports WEP, WPA/WPA2, and WPS encryption protocols to ensure secure wireless connections.

The Alfa AWUS1900 is commonly used by professionals who require high-speed wireless connections, such as gamers, streamers, and network administrators. It can be used for a variety of applications, including online gaming, video streaming, and data transfer.

In terms of physical dimensions, the AWUS1900 measures 9.2 cm x 8.7 cm x 2.1 cm and weighs approximately 70 grams. It comes with a USB 3.0 cable for easy connection to a computer or other device, and also includes a suction cup and clip for attaching the adapter to a surface.

Overall, the Alfa AWUS1900 is a high-performance wireless adapter that offers reliable and powerful wireless connectivity. Its high-gain antennas and dual-band capabilities make it ideal for users who require a stable and fast wireless connection for demanding applications.