Review on Set Of 4 AURSINC SAA-2N V2.2 Vector Network Analyzer Calibration Tools: N-Type Male Short, Load And Open, Female To Female Connector For Improved SEO Results by Leroy Jacobs

I wanted the SAA-2 V2, and I thought I did my research, but after receiving the unit and working with it, I learned that this is most-likely a clone. You cannot update/upgrade the software yourself. The Revain page tells you to go to the github page where you can update the software, and that is where you learn that this device is not supported and was discontinued in 2020.The VNA-QT software does not work with this device on Windows 10, at least I've tried and no joy. VNA Saver works fine. As for the device itself, it seems solid, and appears to work well. I really like it, but I don't like that I cannot update the software.The silkscreen is very faint as well (as stated in the print on Revain), which seems strange to me, but that is not an issue for me other than it could be an indication of a knock off. The cables are great and everything else is as advertised. I have not decided if I'm going to keep it though. Not being able to upgrade the software is huge to me and it is not supported by the community that I can find.I had a NanoVNA H that I upgraded to the latest software but it was the smaller display, so I wanted something bigger. This one definitely is bigger and heavier. It has the metal case and feels good in the hands. The larger battery capacity is great too. Was working on my antenna outside for well over an hour with no problem where my NanoVNA H failed.When you go to the Version number, there is none, another indication of a possible clone. The description comes out and says it is not a clone, which should have been a red flag, but I went for it anyways, thinking what do I have to lose.Again, it works and does what I want it to do, but not being able to upgrade is an issue for me as this device is always changing with new features.UPDATED: I decided that this is not for me. The software does not have the same features as the H4, so I went with the updated 2022 version with the SMA connectors. I really like everything else about this unit, but it will not work with NanoVNA QT so you cannot update the firmware, where the H4 you can.I really don't know if this is a clone or not, but it does not seem to be supported by the website that is referenced on github.I tested this unit against the H4 (with 4.3 inch screen) and they yielded different results - close but different. There could be many reasons for this, but I checked VSWR of both devices against 2 different HF Antenna analyzers and the H4 is the closest, so I am going to stay with the H4 and send the SAA back.