Main Features: Worldwide roaming and global connectivity with one modem Supports HSUPA on 2100MHz, Quad-band class12 GSM/ EDGE on 850/ 900/1800/1900MHz Downlink up to 7.2Mbps on HSUPA and UMTS capable networks, and uplink up to 2Mbps EDGE data up to 236.8Kbps Supports data / SMS functions Accessing E-mail and browsing web Automatically install software, No CD required . Technical Specifications Card Type: USB 2.0 Interface, 5.0V LED Indicator: 1 RGB LED Indicates Different Status SIM Card Interface: 3.0V Antenna: Internal Operating System Support: Windows®2000, XP, Vista . Additional Connectivity Support: Support for Multiple APN SMS (send and receive) Dial-up Networking . MicroSD Memory Expansion: Max up to 8G MicroSD memory expansion Environment Requirements: Operating Temperature: -10f¦ to +55f¦ Storage Temperature: -30f¦ to +60f¦ Vibration (non-operating): 3g peak, 5Hz to 500Hz Humidity: 95% (non-condensing) . System Requirements: Card Slots: USB 2.0 Interface Memory: 64MB RAM or above Standard Package Contents: SC-6309A Modem USB Cable (only for CD-box) Quick Start Guide . Dimension and Weight Dimensions: 94.5*30*14.5mm Weight: 33g.