If you lost a Morph earbud, or your dog ate it, or it got crushed under your car, don’t fret. You can get a spare Morph earbud here.
After you receive this spare, you’ll need to peer-pair it with your other earbud, and pair them with the smart case. To do so you’ll need to perform aFactory Resetsequence.
You can find the Factory Reset steps in the link above, as well as in the FAQs, and in the User Manual.