... , ACC Status, Engine Status, Door Status, Brake Status, Remote controller signal, 2x A/D voltage input10bit digital,5V,12V,24V,30V ... to the vehicle's odometer.vehicle status kinds of analog signal input to detect vehicle statues, 2 voltage A/D input ... TCP using a bigger interval to decrease GPRS network flow. Multifunctional GPS vehicle tracker/GPS AVL/camera AVL, canera security enhanced ...