Detailed Product Description Key Features: Support HSUPA / UMTS 2100MHz or 850/ 1900MHz (optional) or 850/ 2100MHz (optional) or 900/ 2100MHz (optional) GSM / GPRS / EDGE 850 / 900 / 1800 / 1900MHz USB 2.0 high-speed slot Chipset:Qualcomm MSM 6290. SMS Message Data service Downlink speed up to 7.2Mbps (HSDPA) Uplink speed up to 5.76Mbps (HSUPA) Data transmission up to 236.8Kbps (EDGE) High-capacity phone book / SMS box T-flish card:micro SD card slot (up to 32GB) 3 colors LED indicator Environmental Specifications: Operation Temperature: -20~55 Storage Temperature: -30~65 Humidity: ¡Ü93% Vibration (non-operating): 15g peak, 10~500Hz Operating systems Windows2000£»Windows XP£»Windows 7£»Windows Vista£» UBUNTU 8.04 or later, Mac os x 10.4 or later. Selling Point: High speed transmit rate (Downlink 7.2Mbps / Uplink 5.76Mbps) USB Connector Type Phone call, USSD Function Optional Auto installation (plug&play) Customization. Support:Ubuntu 8.04(Linux),Win7 64bit and Mac 10.4 Os or later. Frequency band: UMTS2100 1920~1980MHz 2110~2170MHz GSM 850 824~849MHz 869~894MHz EGSM 900 880~915MHz 925~960MHz DCS 1800 1710~1785MHz 1805~1880MHz PCS1900 1850~1910MHz 1930~1990MHz Mechanical: Dimension: 88(L) x 26(W) x 10(H) mm Weight: 23g.