--one key to switch front / rear camera left right slide to switch the image shot by front / rear camera --the front and rear road conditions are displayed on split screens synchronously , and you can also switch to the full screen to displaythe front or rear car road conditions separately with one ..
--one key to switch front / rear camera left right slide to switch the image shot by front / rear camera --the front and rear road conditions are displayed on split screens synchronously , and you can also switch to the full screen to displaythe front or rear car road conditions separately with one ..