Please note that this technology is a SOFTWARE and not just an electronic device like a radio or other hardware in your vehicle. For the system to properly alert there has to be 1-reliable internet connectivity in order to be connected to the web portal where all the analytics take place. Periodically check that the USB device is lit and the PA icon at the bottom right of the screen indicates device connected, 2- The system has to have a GPS signal to know your location to determine who needs to be alerted. Periodically glance at the display for “System Ready”, “Device Connected”, “GPS Connected” and “On Patrol”