The 598U by Sierra Wireless includes a microSD expansion slot supporting memory cards up to 32 GB for convenient back up storage or file transfer, so users can carry high resolution images, large music files, presentations and other necessary documents with them wherever they go and share them as needed. Provides access to Sprint's Mobile Broadband network from your PC desktop or notebook. Mobile Broadband Capable * with the evolution to EV-DO Revision A, users in markets where it is rolled out, will experience faster average download speeds of 600 kbps - 1.4 Mbps, and average upload speeds of 350 - 500 kbps. Highlights * Easy Install - Plug & Go usability * 2-in-1 device - Mobile Broadband access and data storage device. Key Features * GPS enabled * Web, email capable * Memory card slot * Broadband speeds where available Specifications * Compatibility: XP, Windows® Vista, Windows 7 or Macintosh OS X * Dimensions: 0.9 x 3.1 x 0.44 in * Weight: 0.7 ounces * Chipset: Qualcomm® QSC6085 * Frequency: Digital dual-band (CDMA 1900 and 800 MHz); Supports EV-DO 1XRTT, Rev-0 and Rev. A where available * Antenna: Built-in System Requirements Memory: 64 MB Disc Space: 32MB Processor: Pentium 150 MHz or higher Slots: USB port Tech Specs * Leverages the CDMA2000 1x/EV-DO network with 800/1900 MHz frequency.