G-sensor Driving Recorder

It is necessary to choose which has the function of G-sensor driving recorder , the Car DVR from Genuine manufacturer has the function basically. But the extent of instant record only 15 seconds before and after the speed change occurs, and still have the chance to miss the key recording of a half minutes.
In adding to the above points need to pay a attention , try to choose large cache products, for large cache can bring more fluent video and better memory card compatibility for user, automatic driving record, close automatically when shut down , automatic cover etc are the basic function of the vehicle data recorder, all needs to inquiry clear when we buying.