Aposonic Professional 32-Channel H.264 1U 1080P TVI/AHD/CVI/Analog 4-in-1 CCTV Surveillance DVR, HDMI/VGA Out, Mobile Access, Mac Supported Recording 1080P/1080P-L/720P on HD-TVI/AHD/CVI cameras, or 960H/D1/Half D1/CIF on analog ones. Supports 3rd party brand cameras like Samsung, Amcrest, Q-See, Lorex, etc. 3.5" SATA HDD Bay x 2, max 6TB of each, total 12TB. 1 x CVBS, 1 x RS485 port / 4 x Audio-in / 1 x out, 4 x Alarm-in / 1 x out Smart dual streaming technology to encode recording stream and network stream separately. Support NAT function, QR code scanning by mobile devices. Powerful Configuration capability of Live-view, Recording, Playback, Motion, Backup, Remote access. Intuitive graphical user interface. Live view and access control through Internet Explorer, Firefox ESR, and Safari. Streaming live video / playback on mobile smart phones or tablets via free app.