Basic Functions: 1. Supporting EVDO 800 MHZ or 450M A/B block (REV. A), compatible with CDMA2000 1X network; 2. Easy connection, directly connect to the PC or laptop by using a provided mini USB extension cable; 3. Data Rate up to 3.1Mbps. 4. Data, voice and SMS messaging functions; 5. Supporting SIP function; 6. Compatible with nearly all modern desktop and laptop PC equipped with Microsoft OS (2000, XP, XP Pro and Vista). Characteristics: 1. Plug and play; 2. Good incept balance capability; 3. Industrial technology scheme, superb performance;