This is a protective enclosure for the popular CSR8645 Bluetooth module available to purchase from the like of eBay.

It was designed and tested with the modules that include the 12v regulator. The ones without (that take a 3-6v input) should also fit, but potentially could do so in a thinner case design.

The regulator itself is supported on either side and there are some small vent holes to allow cool air in if the regulator does ever get warm (it didn't in over 60 mins of testing for me)

The box has a 6.5mm hole in the front to allow for cables to pass through. In my case, this allowed for power, ground, audio left, right and audio ground to fit through with 20AWG wire (standard speaker type wire). You could always enlarge with a drill if you required though.

I'm not amazing at 3d design so it is pretty simple, but if there's anything that you think is missing, let me know or do a remix.

I have included Deeper versions of each box in-case your requirements need them, and also the STL files for editing for yourself.