This is modified on the basis of the previous style. Headphones share part of the mold. A new cover is replaced. The charging box has been redesigned with a rotating cover.
Rotating lid opening method
Black
White
Red
Black, white and red three-color charging box
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What is the structural principle of this screw cap, can the bosses popularize science
Very good ID, but consider how to take out the earphone.
Directly screw the cap? Is there the possibility of pressing the cap /I> no estimate easy to break
Sofa