When the newly purchased cable was hard and shared, I found out and purchased FINAL's ear hook where I was checking for somehow.
I purchased both Typea and B, and started using it from A, but in the case of A, it was sometimes removed during use.
It is good to return immediately even if it is partially removed thanks to the lock mechanism that has been changed to B.
I also thought that the rock mechanism would be big, so I thought it would be worthwhile, but I wasn't bothered at all.
I want to buy it again when it deteriorates.