The new DM-DV-S1648 comes with the New DET (Dual Encoding Technology) enables separate controls for local video encoding and network transmission; offering flexibility in video monitoring environment on various network conditions. The main features supports Pentaplex 16Channel 480 FPS, H264 Records and Plays in High Definition Video, Audio Recording and Playback (2-way Audio Conference) E-mail Notification (Video Clip, Still Image, Message) Archiving (JPEG, EXE Format) User-friendly Server GUI & Front Design Embedded Linux OS. All of this features makes this DVR a reliable dvr that will never give you problems regarding anything you want to do on it such as remote view, backups and setting up the DVR menus and settings.