Forward camera records in the event of a traffic incident whilst the rear camera records in the event of an incident that may occur within the vehicle. This 2 Channel DVR system uses a H.264 image compression chip. Sensor device a VGA CMOS sensor for both forward and backward facing lens with 120 degree outside view and a 170 degree inside view. Storage is a Micro SD card up to a 32 GB with a 4GB supplied. Recording frame is 640 x 480 with 30fps resolution (forward) and 640x480 with 15fps (rear). The system has audio recording capability inside the vehicle with time / date stamp on video recording. Warning - GPS positioning speed will be influenced by solar film on the front windscreen, weather or other environment factors, therefore no warranty is given on the GPS capability of this device.