Itronics ITB-70G Car Black Box Dash Camera Video and Audio Recorder with GPS Record Car blackbox with video, audio and GPS data recorder. Compatbile with Window XP, Vista and Win 7 32 bit The video and audio data are continuously recorder in H.264 compression format Records data due to collision, sudden acceleration and brake by the built-in impact sensor The recorder data is marked as event files in SD memory card (4GB card included - unit supports SD card up to 16 GB) Product Update: Effective mid May 2011, the display shows speed in MPH. Manual "record" button to record any specific view Not compatbile with Mac OS and Win 7 64 bit