Driving safety record without dead angle

On the "pengci" news It is often seen. though it has passed, for a long time, but for friends "pengci" two words are still people hung up, more and more riders choose to install the driving record in the car in order to prevent accidents, although played a certain role, but is GPS and the recorder makes itself small the front windshield is occupied small space, interfere with the driver's line of sight, and most of the tachograph due to the wide-angle lens is awesome enough, not enough video in front of the scene, and leaving no small road safety hazard.