in home camera system
What is the best home camera system? How much is a home camera system?

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.

HeimVision HM241 1080P Wireless Security Camera System, 8CH NVR 4Pcs Outdoor WiFi Surveillance Camera with Night Vision, Waterproof, Motion Alert, 
HeimVision HM241 1080P Wireless Security Camera System, 8CH NVR 4Pcs Outdoor WiFi Surveillance Camera with Night Vision, Waterproof, Motion Alert,