If you are worried that the dash cam is too big, the driving safety will be affected. Choose us, our 1.5-inch mini-size screen is easy to hide, and won't obscure or distract your vision while you driving, so it guards your safe drive. Automatically overwrites the oldest footage to prevent the recording from stopping when the memory card is full(Locked clips won’t be overwritten), keeping the device shooting seamlessly without frequent formatting needed. With a built-in G-sensor, dashboard camera can automatically detect a sudden shake/collision and lock the footage to be truly restored. When on standby, the dash cam will detect whether there is a moving object, and the recording will be auto-on if it finds a moving object.