H.264+ Codec, Save Storage up to 70% (You can save 1.5 HDD for the same long recording) | 12 Channel DVR NVR (8 Channel HD Aanlog Cameras [up to 4MP] and 4 Channel IP Cameras [up to 5mp]), 5-in-1 (Support HD-CVI, TVI, AHD, CVBS 960H, IP), No PoE (For IP camera, you need use 12V DC or external PoE Switch) | Intelligent Video, Smart Search: Tripwire, Intrusion, Abandoned/Missing Object, Face Detection | P2P: Scan the QRCode for remote access via Phone and Computer, Support 128 Remote User Login, plug and play | UL Listed Certificated, Smart Fan (automatically turn on and off based on CPU temperature), 1 Channel audio in and out (2 way audio), 1 HDD Slot (HDD is not included), up to 10TB;