I am super pleased to be able to tune my antennas now! Being able to verify your designs and even better - verify the quality of 3rd party antennas is great for selecting optimal performance in meshtastic and other SDR applications.
According to the listing this is the specification of the VNA:
NanoVNA-F V2 Antenna Analyzer
4.3inch NanoVNA V2 Vector Network Analyzer
3G Upgraded Version
NanoVNA with 5000mAh
Measuring S-Parameter Voltage SWR Phase Delay Smith Chart
Apparently there is a version that jumps up to 6ghz, that is double the price. Could be useful if you need that range. I am going to have a lot of fun trying all manner of designs now!