H.264 & Dual Stream Video Compression, 2U Case support up to 8 SATA and 48TB, Bonus: add up to 16 IP cameras, Supports 24CH Simultaneous Playback, 16 / 1 CH Audio I/O, 16 / 8 CH Alarm I/O, 2 Network Ports, 2 HDMI Interface (1 Spot Out), Supports 8 POS, Supports IP, HD-TVI, and Analog Cameras