Hello mate, missed this somehow.
These are the two I ordered:
This thing was slightly fiddly to setup, stupid ppl in comments saying doesn't work and not reading the instructions. It might need a full charge before you can get the weak onboard wifi working and then just make sure it's connected to your phone before you run the accompanying (crappy but essential) app. Gimme a shout if any issues.
Any will do as long as they come with the mic holder which is where you'll stick the microscope instead.
Hope that makes sense. I'm sure Amz UK will have same or similar.