If it's anything like the PE1NNZ uSDX/derivatives it tunes only in the (rough) ham bands - obviously if you modify the firmware to remove the end limits of the

If it's anything like the PE1NNZ uSDX/derivatives it tunes only in the (rough) ham bands - obviously if you modify the firmware to remove the end limits of the ham band you can tune to other frequencies but fundamentally, the thing has a bunch of relays and coils for the different bands.