Features:               Suitable for use on EDGE/GPRS/GSM network worldwide          Qua-band 850 / 900 / 1800 / 1900MHz          EDGE 236.8 Kbps high-speed data performance, GPRS/GSM data speeds to 85.6 Kbps (Network dependent)                Specification:               USB 1.1 interface          External antenna          EDGE MS class 12 (up to 4 Tx, 4 Rx, 5 total)          LED indication: status LED, data LED          SIM card interface: 3.0V interface                Additional connectivity support:               EDGE, GPRS, and GSM circuit switched data          Supports multiple APNs          SMS (send and receive)          Voice and fax supportable                Operating systems: Windows 2000, XP, Vista      System requirements:               Card slots: USB 1.1 interface          Memory: 32MB          Disk space: 20MB          Disk drive: CD ROM (installation only)          Dimensions: 90.5MM45.77MM16.5MM