Model : MH-E800C Selling point: Voice supported; price competitive ; Nice design Technical Standard: EVDO Rev A 3.1MbpsDL, 1.8Mbps UL EVDO Rev O2.4MbpsDL, 154kbps UL CDMA 1X 154Kbps DL Antenna Built In Yes Additional function : supported TF Card Frequency Band: EVDO 800Mhz CDMA 1X 800Mhz Power Class: EVDO Rev A Power Class 3 EVDO Rev O Power Class 4 CDMA 1X Power Class E2 Standard Package Contents: EVDO USB MODEM 1 Quick Start Guide 1 System: Win2000/ XP/ VISTA Win 7 Software support: SMS, Phone book, internet, setting