I want to buy an SDR RTL USB dongle and I'm looking for one on Amazon. I currently saw ones from 100 MHz to 1.7 GHz.
I can't decide and I know almost nothing about radio, but I want to experiment with this piece of hardware + the software. I see many come with an expansion that expands the frequency range even more. Should I get this expansion device from the start?
I want this dongle to use it on PC, laptop or android devices, to be more specific I want it to be radio dongle, but I don't know if it can support TV as well and I'd like it to have the widest frequency range as possible.
What things should I have in consideration when buying one of these dongles, taking in account the things I wrote before?