front door camera system
What is the best front door camera? How much does a front door camera cost?

Network video recorder (NVR) is a specialized computer system that includes a software program that records video in a digital format to a disk drive, USB flash drive, SD memory card or other mass storage device.

front door camera. Blink XT2 Outdoor/Indoor Smart Security Camera with cloud storage included, 2-way audio, 2-year battery life – Add-on 
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