Up to 8 cameras with 1080p realtime preview. H.264 dual-stream video compression. Full channel @960H realtime recording. HDMI / VGA / TV simultaneous video output. 4 channel synchronous realtime playback, GRID interface & smart search. 3D intelligent positioning with Dahua PTZ dome camera. Support 2 SATA HDD up to 8TB, 2 USB2.0. Multiple network monitoring: Web viewer, CMS(DSS/PSS) & DMSS.