https://www.amazon.com/EmpireTech-IPC-T5442T-ZE-Vari-Focal-Eyeball-Starlight/dp/B08C77TNY9/ref=sr_1_2?crid=7B4Z9PUWPJJP&keywords=Dahua+5442&qid=1669948632&sprefix=dahua+5442%2Caps%2C136&sr=8-2&ufe=app_do%3Aamzn1.fos.18ed3cb5-28d5-4975-8bc7-93deae8f9840 this camera? Recommended to buy through amazon? Says sold by empiretech andy
I see that the pictures of the camera have a 2nd wire, like a DC power. Is that necessary in addition to the cat cable? And which NVR is recommended to pair with those cameras?