Just qcy-t3 bluetooth earphones & case.
I had lost charging case and I bought new one (full set).
Now I'm using two earphone sets with my son sharing one charging case.
But I need carrying case although it cannot charge.
So I designed it from scratch, printed it and use it.
P.S. There are STL of two earphones, you don't need to print it (only for modeling).
Doesn't matter PLA