Aposonic 4 Channel H.264 1080P AHD/TVI/960H Tribrid Surveillance DVR, HDMI/VGA/BNC Output, Mobile Access, Mac Ready (No HDD) 1080P/720P/960H/D1/Half D1/CIF Real-Time Recording / Playback Quality. Recording 1080P @ 60 FPS / 720P @ 120 FPS on AHD/TVI cameras, and recording 960x480 / 720x480 / 720x240 resolution at 120 FPS on 960H analog cameras. 3.5" SATA HDD Bay x 1, max 8TB. RS485 x 1, Audio Input x 1 / Output x 1, Alarm Input x 2 / Output x 1. Firmware upgradable. Powerful Configuration capability of Live-view, Recording, Playback, Motion/Alarm, Backup, Remote access. Friendly and Easy Graphical User Interface Live view and access control through Internet Explorer, Firefox, Chrome, and Mac OSX/safari Support live view and remote configuration via all web browsers on Mac and PC. Streaming live video / playback, 1 screen zoom-in on mobile smart phones or tablets via free app.