Model: MH850A Selling point: Voice supported; price competitive; Nice design Technical Standard: EVDO Rev A 3.1Mbps DL, 1.8Mbps UL EVDO Rev O 2.4Mbps DL, 154kbps UL CDMA 1X 154Kbps DL Antenna Built In Yes Additional function: supported TF Card Frequency Band: EVDO: 800Mhz or 1900Mhz( Optional) 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