Vidvision 3 In 1 720p HD Dash Cam, Speed Radar Detector, and GPS Tracker GPS Coordinates-based notification of Red-Light and Speed Cameras. For this function you need to load your own database, as it differs from region to region. Over Speed Alert, based on GPS System, which can be turned on/off or modified to your selected speed. MicroSD Card support up to 32gb (card not included) Recording starts as soon as the driver starts the vehicle, as long as the device is connected to the car adapter. Provides great evidence in case of accidents, traffic tickets, etc.