The AirCard 875U USB Wireless modems network card are a new addition to the Sierra Wireless product family. Packaged in a stylish, compact form factor, the AirCard USB modems can either plug directly into any USB port, or can be connected via the included docking cradle. Compatible with both Microsoft Windows and Mac OS X operating systems, the AirCard USB modems offer customers an alternative to both PCMCIA and ExpressCard solutions KEY BENEFITS: Stylish, portable solution for enterprise & home use, offering the best mobile and fixed wireless alternative available on the market High speed wireless connectivity in more places than Wi-Fi, offering greater mobility Support for latest 3G technology, but backward compatible where 3G is unavailable Secure internet access wherever there is network coverage Solid product reliability so users can work efficiently on the road Specifications: Suitable Network: GPRS CSD,EDGE, UMTS ,HSDPA Max Transmitting Rate: 3600 kbit/s, Applied Frequency Range: UMTS/HDPA2100mhz/1900Mhz/850Mhz GPRS/EDGE850/900/1800/1900 MHz Interface: USB Operating System: Windows98/2000/XP/Vista/Mac OS X