H.264+/H.264 dual-stream video compression; Analog Camera Input: 16 Channel, BNC; IP Camera Input: 16+8 Channel, each channel up to 8MP; Audio In/Out: 1/1, RCA; Two-way Talk: Reuse audio in/out, RCA; Interface: 1 HDMI, 1 VGA; Playback: 1/4/9/16; Internal HDD: 2 SATA Ports, up to 8TB capacity for each disk; Power Supply: DC12V/5Aen