Dear user, we are sorry for your inconvenience. When the smart camera screen becomes black and white, you may have turned on the camera's night vision mode. This mode automatically turns on when the camera cannot capture sufficient light. To turn off the night vision and reset the color of the video, you must place the camera in a well-lit position. If there is a phenomenon that the settings cannot be saved, this is a problem of the product itself, please contact the equipment seller for handling. Thank you for your support and understanding.