As a rule of thumb, we recommend 2 Terabytes for a 4 x 4/5MP HD camera setup, as this should give you approx 2 weeks using H.265 @ 20fps and that is on continuous, not motion-detected recording. AI by Camera Facial recognition, perimeter protection, video structuralization, throwing objects from building, motion detection 2.0, ANPR, people counting, VCA This NVR will accept any capacity hard drive (HDD) currently available. Any maximum capacity stated on the manufacturer’s documents is simply based upon the maximum HDD size that was available at the time of release/publication Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up HDMI Output 1-ch, 4K (4096 x 2160)/30 Hz, 4K (3840 x 2160)/30 Hz, 2K (2560 x 1440)/60 Hz, 1920 x 1080/60 Hz, 1600 x 1200/60 Hz, 1280 x 1024/60 Hz, 1280 x 720/60 Hz

For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" After ultra HD resolution mode is enabled, the NVR supports up to 8-ch 32 MP/24 MP IP video inputs.Facial Detection and Analytics Performance 4-ch human face capture (HD network camera, up to 8 MP, H.264/H.265) Decoding Capability 2-ch@32 MP (30 fps)+2-ch@8MP（30fps）/10-ch@8 MP (30 fps)/20-ch@4 MP (30 fps)/40-ch@1080p (30 fps) You can also use the Hikvision online calculator to work out what works best for you specifically: https://tools.hikvision.com/ca... Up to 12 rules in total;4-ch, 2 MP (H.264/H.265) video analysis for human and vehicle recognition to reduce false alarm;

Human/Vehicle Analysis Up to 4-ch 2 MP (H.264/H.265) video analysis for human and vehicle recognition to reduce false alarm HDMI Output 8K (7680 × 4320)/30Hz, 4K (3840 × 2160)/60Hz, 4K (3840 × 2160)/30Hz, 2K (2560 × 1440)/60Hz, 1920 × 1080/60Hz, 1600 × 1200/60Hz, 1280 × 1024/60Hz, 1280 × 720/60Hz, 1024 × 768/60Hz

Hikvision DS-7616NI-I2/16P/CVBS 16Channel 16 PoE 2 SATA 12MP 4K NVR, Plug & Play with 16 Power-over-Ethernet (PoE) interfaces 

Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras: HDMI Output 4K (3840 × 2160)/60Hz, 4K (3840 × 2160)/30Hz, 2K (2560 × 1440)/60Hz, 1920 × 1080/60Hz, 1600 × 1200/60Hz, 1280 × 1024/60Hz, 1280 × 720/60Hz, 1024 × 768/60Hz

Up to 12 rules in total;Up to 4-ch 2 MP (H.264/H.265) video analysis for human and vehicle recognition to reduce false alarm

The DS-7616NI-I2/8P is ready for Hikvision's Automatic Number Plate Recognition Cameras (ANPR) and supports two way audio among other features. A power supply is included with this. HDMI Output 4K (3840 × 2160)/60Hz, 4K (3840 × 2160)/30Hz, 1920 × 1080/60Hz, 1600 × 1200/60Hz, 1280 × 1024/60Hz, 1280 × 720/60Hz, 1024 × 768/60Hz

Facial Detection and Analytics Performance 1-ch human face capture (HD network camera, up to 8 MP, H.264/H.265) You may only require the full 25 frames per second on certain cameras if things are fast-moving - ie above a till) Finally, you can often make your storage space last a lot longer by enabling motion-detected recording rather than continuous, especially if there are long periods of no activity (to perhaps double or more these figures again). A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom"i can use the TFTP tool (tftpserv ver1.0)and connect successfully. but then it looks for a file econt-vision-av2000