3 Channel Dash Cam Front and Rear Inside, UHD Dash Camera for Cars. The Message of D70 Dash Cam: Q:How do I enable the 24 parking monitoring function? Do I need to purchase a hardware package separately? A:Yes, you need to purchase a hardware kit connected to enable 24/7 parking monitoring. After the engine is turned off, 24 hours of video is automatically captured. Q:If all three cameras work at the same time? How does the rear camera record? A:Yes, this dashcam works on three screens at once. If you don’t install a rear camera, it will only record two front and interior views. Q:Do I need to prepare an SD card in advance? So that I can use it immediately when I receive it. A:It is recommended to purchase the included memory card. After receiving the camera, insert the memory card and format it, and the camera can be used normally. Q:What should I do if there is a problem with the product? A:Regarding any product in our store, we will be responsible for solving the after -sales problem for you. When you need help, you can contact us - we will provide you with happy satisfied support!