earphone cable connector thing
thingiverse
its a very tiny but might be very helpful thing if your earphone cable doesn't have that thing to put it under your chin.
Download Model from thingiverse
With this file you will be able to print earphone cable connector thing with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on earphone cable connector thing.