Having a powerful device as small as the Pi Zero opens up all sorts of opportunities for covert operations. So why don't we build a voice recorder that we can take out with us and hide on our person—but which will also do everything else we'd expect from the Pi Zero? The low power requirement means that we can get hours of portable power from a small lithium-ion power bank.
Now, while the Pi Zero is very small, unfortunately the standard connector kit for power and USB makes it bulkier once we start plugging things into it:
The bit that was bothering me was the bulky and long USB adapter to convert the Pi's micro-USB connector to a normal USB connector so I could plug in the audio adapter, but having a poke around on Amazon yielded the availability of very small form-factor converters:
So this is what my Pi Zero looks like with my USB audio device connected to it using the small...