Car dvr Rearview CiBest HD 720P Car Cam Video Recorder Rearview Mirror Car Camera Vehicle DVR H.264 Dual Lens Dash Cam G-sensor function, when happens accident, files will be saved by force. Automatic circulating recording, it is able to set the record time for each file When connected with car charger, device will turn on when car starts, turn off and save the last video when car is powered off Motion Detection video recording functions:With the first motion detection feature, it starts recording automatically itself if there is motion in the video without pressing any button The maximum support 32GB TF high-capacity storage devices (TF card not included). Suggest use speed greater than class 10 The rear camera is waterproof