With built-in G sensor, the mirror dash cam will lock emergency video in the event of an accident to prevent being overwritten. Triggered by parking monitor, the dash cam will automatically turn on and take 20s footage when detecting collision. Easy Installation & Support Max 64GB Micro SD Card You don't need to remove the original rear view mirror, just attach the mirror dash cam to the mirror by the rubber straps. This dash cam supports max 64g high speed SD card(Not included). Please format the SD card before using.Professional customer service will work on fixing any issue within 24 hours. You will enjoy the best shopping experience! Camera:500 Mega Pixels(IMX335). TF (max 64GB, Not included). Power interface:5V 2.0A. Item Processing Time: The processing time for a specific order varies with the product type and stock. All our item offer 7 days return peroid, defective or non-defective. Return must include all original package and accesorries, item must in good condition. If you have any issue, you can just give us a message, and we give you full resolve. Please be patient when contacting us, all messages will be replied within 24 hours. Please let us know immediately if a package is damaged upon arrival. Taking any action, please co. The item "12 2K Rearview Dual Lens Mirror Dash Cam Backup Camera Recorder Touch Screen HD" is in sale since Monday, August 17, 2020. This item is in the category "Consumer Electronics\Vehicle Electronics & GPS\Car Video\Other Car Video". The seller is "zhengwelding" and is located in Shenzhen. This item can be shipped worldwide.