Very basic case / cover / holder for this TaoTronics bluetooth receiver:

https://www.amazon.co.uk/gp/product/B00Y29NXEA/ref=ox_sc_act_title_1?smid=A2X2NO3429IQ5W&psc=1

Quite easy to push to button when in tight pockets, so made this cover to protect it a little.

Holes left for volume, headphones and charger

Designed with 0.2mm clearance on each wall, which is perfect fit for mine

Original Fusion 360 file attached