Very nice system for its price, both this and the nvs0009 8-piece set that I have specifically. Just one important detail, after purchasing and installing it, you should definitely make the following necessary adjustment in the menu... network, wifi access point, change region to EU, specific channel other than auto or 13. This is because it interferes with nearby telecommunications networks. The instruction manual and the supplier in the selling company should mention this.

The second one I'm getting (for another house) because I am very satisfied with the first one, which has been working perfectly for three years. For indoor use, I would recommend a wider lens. For outdoor use, it is flawless.

Before buying it, I had asked the company selling it if I could connect more cameras (from the same company). They had contacted (so they told me) the representative and they had responded positively. After installing it and asking to buy more cameras, the representative told me (and when I contacted them, they told me the same thing) that I couldn't connect more than 4. I tried to ask the manufacturer. I sent them an email, they replied "a colleague who knows about our product will answer you", but they never replied.
When one of the four cameras broke, I asked the representative to buy a spare part (just one camera), and they replied that they don't sell spare cameras. It should work with what comes in the package.
I definitely wouldn't buy anything from the same company again, nor a product imported by the specific importer in Greece.

Very good set, good price and decent machine. Everything you need is in the package (except for the hard disk). It includes 4 cameras, recorder, bases, screws, mouse. The image it provides is very clear. The connection is smooth. The good thing is that the cameras also function as repeaters. This means that, for example, if they are placed in a row and the last one is far from the receiver, it receives signal from the closest camera as long as it has signal. The only reason I give it 4 stars is because the lens is not wide-angle enough, resulting in it not working well in many cases inside stores. It also doesn't have a Zoom option.

I bought the 12th 2020 system.
Very easy to install the disk and relatively easy to program.
Easy installation of the 4 cameras and generally at a long distance.
The one that is farthest away does not have a good signal, but still provides a normal image.
I don't know if I can add more cameras since the program can handle up to 8.
Overall, a very good purchase for 129 euros...
If I find them on sale again, I will buy them again.

They were purchased with great caution at a super price (120€). The result left me speechless! Very good quality, the cameras are located at a distance of 7-8 meters from the recorder and despite being wireless, they have absolutely no problem.