Coastwatcher,
I get why you want it to be wireless, but you're going to sacrifice a lot of capability for such a device. I get why you want to use it on an iPad, but it's not really the best option to achieve what you really want out of it.
I'm now on my 3rd USB microscope, the current one with a 10x - 150x capability. I understand why hy-brasil recommends a 10x magnifier, but I have to disagree overall that it will achieve what you are after, particularly if you want to take a photo in the process.
I've been toying with going for a very very high power scope lately for gum and paper study, but that's a bit more specific.
The wireless scope, the issue I have with them is strength and durability. I started with a scope that had a sort of positioning/free had use (a Celestron 10x - 50x). It was ok, but as hy-brasil also mentioned, a bit fiddly. I tried with another brand at the same power, but it was also disappointing, it was just too unstable, and hard to keep an object in it. I then went to a model that has a fixed platform base, and similar to slide clips, the scope is held at a fixed position outward on an arm, and you can fine-tune height with 2 settings, then focus change with a center wheel in the scope itself. This is ok, but I would love it if I could get a motorized focus (even an auto focus), but to date haven't found such one. But there are also some other "free-standing" scopes that have displays built in. I was just today contemplating getting one of these, and the screen capture can still be sent to the PC via USB.
This is the one I'm currently using about $80 from Amzaon.
https://www.amazon.com/Celestron-Ha...b+microscopeThis is what I've been contemplating getting something like this (~$199 - $300 depending on make and model)
https://smile.amazon.com/gp/product...70_388947050