Embedded Linux operating system, H. 264 video compression format 720 p hd resolution Downward compatible with sd analog input  languages menu, adapt to a wider range of user groups Support the pppoe dial, 3 g, a key to get to the Internet CVBS, VGA, HDMI synchronization output The factory default support to mount 2 TB x 1 large capacity hard disk, can be extended Email, FTP screenshots, various video modes A graphical user interface, simple and convenient operation IE browse, centralized monitoring and management, mobile browsing U disk, mobile hard disk, and network backup Many user rights classification management