[Loop Recording & G-Sensor] When the TF card is full, continuous loop recording automatically overwrites the oldest footage with new recordings. Our dash cam supports a 64GB TF card (including a 128GB TF card) and can accommodate a maximum of a 256GB TF card. In a sudden collision, the G-sensor will detect the impact and lock the current video file to prevent it from being overwritten. Note: The 24H parking monitor needs an extra harness. Please contact us via if you need it [4K Image and Ultra HD 2160P Video] Equipped with an f/1.6 aperture lens and a CMOS sensor, this 4K dash cam captures explicit videos at 2160P/30fps, ensuring you can see every detail. With HDR (High Dynamic Range) technology, the KBSYNT dash cam has good night vision and delivers sharp video and images even at night. In low-light conditions, the dash cam automatically adjusts the exposure for optimal visibility [Easy operation & Free app] The KBSYNT 4K dash cam makes it easy to download videos using t