1. tablet PC modem 2. tablet PC 3G modem 3.450MHz EVDO REV. ... rate EVDO Rev. A: downlink 3.1Mbps, Uplink 1.8MbpsRF band: CDMA 450MHzSystem Requirements:Card Slots: USB InterfaceMemory ... -30~65Humidity: ≤93%Vibration (non-operating): 15g peak, 10~500 HzOperating systems Windows® 2000, Windows® XP, Windows® Vista ... , Linux ,Mac OS x 10.4, Windows 7 32-bit and 64-bit tablet PC 3G modem