Please see today's article in CNN Money:
Quoting from article: "The MiMAX USB is a ground-breaking product that will enable end-users to connect to virtually every Mobile WiMAX network that is deployed worldwide, and supports all of the target Wave 2 MIMO Mobile WiMAX certification profiles (2.3 GHz, 2.5 GHz, 3.3 - 3.8 GHz, and 4.9 - 5.8 GHz). This capability enables service providers to offer roaming services across multiple WiMAX networks regardless of the frequency band used. This incredibly slim device measuring just 98mm x 36mm x 8mm -- around 28cc, is one of the world's first WiMAX USB devices. The device is light and easy to carry, making it an ideal companion for the laptop-carrying traveller. The device is powered, via the USB port by the host computer. Its low power consumption and support for Mobile WiMAX idle and sleep modes means that while battery life is conserved, the MiMAX USB still delivers +22dBm at 2.3, 2.5 and 3.5 GHz and +17dBm at 5 GHz."