... Micro SD host interfaceSerial Ports Support 2 x 3-wired DMA-based operation UART One UART fully ... with resolution 800X480 or equvalence3.5G Module U-Blox 3.5G HSDPA 800/850/900/1700/1900/2100MHz, ... USB device, ix USB host , 1x DC Power port and 1x Power switch , 1x Microphone Jack, 1x Buzzer Port Built- ... data terminal, cab dispatching,taxi dispatching system,3.5G/GPS 7 inch MDT701,RS232 IO ports