B07FR1LDSM 8CH 3MP Full HD Security Network Video Recorder NVR System with Built-in WiFi Router, Supports 8 Cameras, Supports up to 4TB HDD (HDD Not Included), No Power Adapter Work with Hiseeu Wireless Camera.

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Please notes: when you get package, there only is one NVR, no power adapter, no HDD cable, no mouse and no HDD, all the accessories you need buy it by yourself.
When you receive the new nvr box , there is no match between the new nvr box and the original cameras. 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.
1) Right click your NVR mouse choose wireless add 2)Press camera reset button for 6 seconds 3)Wait for IP address 172.20.14.** show up 4) Exit>OK.
Please notes when you connect with HDD, NVR power adapter should be 12V2A or 12V2.5A.
Buy power adapter search ASIN: B07GP1DX4N