Aposonic A-S1601T2EC Professional HD-TVI AHD 1080P / Analog 960H Hybrid 16-Channel H.264 CCTV Surveillance Digital Video Recorder with HDMI/VGA/TV Output, Mobile Access, Mac Ready (No HDD) Recording 1080P/1080P-L/720P on HD-TVI/AHD cameras, or 960H/D1/Half D1/CIF on analog ones. 3.5" SATA HDD Bay x 2, max 6TB of each, total 12TB. 1 x RS485 port / 4 x Audio-in / 1 x out, 4 x Alarm-in / 1 x out. Support HD-TVI, AHD, Analog, and 4 extra IP cameras. Firmware upgradable. 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.