H.264, H.265, Smart H.264+, and Smart H.265+. H.265 auto switch; AI by Camera: Face detection, perimeter protection, IVS, people counting, heat map, and SMD; Perimeter Protection by Camera: 8 channels; Face Detection by Camera: 4 channels; SMD Plus by Camera: 12 channels; Multi-channel Playback: Up to 16 channels for playback; Audio Input: 1 × RCA input; Audio Output: 1 × RCA output; HDD: 2 SATA III ports, up to 10 TB for a single HDD. The maximum HDD capacity varies with environment temperature; Alarm Input: 4; Alarm Output: 2; Network: 1 × RJ-45, 10/100/1000 Mbps self-adaptive Ethernet port; PoE: 16; Power Supply: 100 V–240 V, 47 Hz–63 HZ, 3.5 Aen