This is Remote Car Recorder Vehicle DVR Dashboard Camera, It is Mobile DVR with 2.5" TFT LCD Screen, Support Windows2000/me/xp/2003; Vista; macos; linux Operating System, Support Video Format: AVI file format 30fps, Support SD/HC Cards: Up to 32GB, High speed recording and quick light respond. After it plugs into the cigarette lighter, you can ignore this Mobile DVR until you want to get back the video inside. It is because this device will power on and start to record when you start your car. Each time you start your car, each time it starts recording automatically. The Video Camera Recorder is divided into 5 minutes segments each. When the memory card is full, the Video Camera Recorder itself will erase the oldest file and record continuously, never stop while your engine is on. After the first installation, no need to take care it as it runs by fully automatic! For those cars with cigarette lighter still giving power when the engine is turned off, this Car Recorder does not stop in automatic.