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: 4 channels; Face Detection by Camera: 4 channels; SMD Plus by Camera: 4 channels; Multi-channel Playback: Up to 4 channels for playback; Audio Input: 1 × RCA input; Audio Output: 1 × RCA output; HDD: 1 SATA III ports, up to 10 TB for a single HDD. The maximum HDD capacity varies with environment temperature; Network: 1 × RJ-45, 10/100 Mbps self-adaptive Ethernet port; POE: 4; Power Supply: 48 V/53 VDC, 1.25 A/1.13 Aen