No HDD 12Inch LCD Wireless WiFi NVR 10 Channels Network 12inch nvr monitor
You need to pair them. And you need to open the original NVR box, remove the hard drive from the old NVR box and install it into the new NVR box. If your power adapter does not reach this power, it will not be enough to drive NVR.
VIZIUUY Solar Security Cameras Wireless 3MP-3PK, White – 3Pack 3MP Cam
Publisher: VIZIUUY.
【No HDD】 10” LCD Wireless WiFi NVR 10 Channels Network 10inch nvr monitor
Internet connection is only needed when you want to view from elsewhere.