When the memory card is full of files, the original video file will be automatically overwritten to ensure that the video files are recently recorded. Motion detection, recording when there is a moving object, automatic standby when there is no moving object, saving power. Built-in large-capacity battery, support for charging and recording. Smaller micro-monitoring: 4.0x 1.6 cm in diameter, ultra-small and ultra-thin. It is suitable for personal, home, and business security monitoring, law enforcement, driving, and cycling records.