+1^^^.
Cameras and DVR/NVR's at HF are all analog (use BNC connectors) and are crappy at best, non-functional at worst....save your money, add some to it and purchase a name-brand NVR and compatible cameras
Continue to read here on IPCT to help determine your needs (number of cameras, focal length) and how you will implement.
Don't fall into the high megapixel trap ("ya gottta have 4K cameras"). The more megapixels (higher resolution) a camera has then the larger the camera's image sensor must be in order to produce viable images at night or under poor lighting, especially when there is motion. A 4K/8MP camera with a properly-sized sensor (1/1.2") can be VERY expensive. For starters, I recommend a 4MP camera with a 1/1.8" sensor, such as this one ==>>
EmpireTech 4MP 1/1.8" CMOS Ultra Low Light Starlight+ IR Turret AI IP Camera SMD 3.0,AcuPick,IP67,Support POE and ePOE,Built-in Mic,Vehicle and Human Detection,S3 Version IPC-T54IR-AS 2.8mm
It's a turret form factor (some say "eyeball") and is preferred over a bullet (OK for some apps like License Plate Reading) or a dome which is seldom recommended because the dome requires frequent cleaning due to smog, moisture and dust plus over time UV and ozone attacks the plastic dome making it foggy.
Quality, name brand POE cameras and POE NVR's employ wiring and operate on voltage that comply with a specification called 802.3af/at. CCTV devices from Harbor Freight, Zosi, Zmodo, funlux, Sannce and others do NOT comply and may use non-compliant voltage and wiring on their so-called "POE" devices.
Many IPCT members have come to trust and depend on Empire Tech's product line of IP cameras and NVR's from IPCT member
@EMPIRETECANDY ....you'll get excellent products and superior customer service from Andy.
