Up to 16 cameras with 1080p realtime preview. H.264 dual-stream video compression. All channel @960H realtime recording. Support A/D switch. HDMI/VGA/TV/Spot simultaneous video output. 16 channel synchronous realtime playback, GRID interface & smart search. 3D intelligent positioning with Dahua PTZ dome camera. Support 4 SATA HDDs up to 16TB,1 eSATA up to 4TB, 2 USB2.0. Multiple network monitoring: Web viewer, CMS(DSS/Smart PSS)&Smart Phone(DMSS).