CarAssist is designed for DVR with 3G/4G mobile network.[Car Life]: Share the amazing/interesting view on the way.[DVR]: Preview video from DVR camera, capture video or photo, operate DVR, playback map track of car.[Phone Files]: Files in cellphone, list files downloaded from DVR, including loop/locked and captured files, click to playback, select to share/delete.[Me]: Manage DVR thought cloud server, monitor or playback GPS track of your car.