I think a USB endoscope/inspection camera could be useful, for looking in small spaces. It seems there's loads of these available cheaply, eg on Ebay, or Amazon, or Gearbest etc, for under $10.
But which ones are any good?
I would like to connect it to my phone or tablet (Android), so would need a Micro USB connection. Would be useful if it also had an adapter for regular USB. Presumably they require their own app/software.
Is there much difference in image quality between them? I'm not expecting high resolution, just good enough to see what's there.
It would need a cable a couple of metres long, and some sort of LED lighting on the end. And preferably water resistant.