Heck, it's confused with NanoVNA-H (4).
However, it can be read that it is a 2.8 "-H shipped with this firmware.
As Roger Need wrote, the firmware needs to be updated.
If you haven't already done so, read the descriptions on the forum Wiki or you can read it on my website.
Sorry I misled you in the previous post.
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Gyula HA3HZ ( )
HA3HZ