The main functions of the APP are as follows: Device management: Supports manual addition of devices, and the device list can be viewed on the home page after the device is added; Real-time preview: support real-time video viewing, and provide functions such as video recording, screenshots, collection, and PTZ control during the video preview process; Video playback: support the video recording function of the remote playback device, and provide the function of searching video according to time; Event center: support the mobile terminal to obtain the alarm message of the monitoring equipment in real time, and view the details of the alarm event through the message; Media library: Support viewing media files generated by users through videos and screenshots; Favorites: Support users to bookmark the video channel of the device, and quickly find the device of interest through the favorites;