not state of the art bt headset but can confirm is in good working order, only slack part is that you have to stuff is in your ears rather than clinging to your ears. Thats why it has a matching neck strap, so you can hang it around the neck.
many single scoll owner upgrade using after market like tomei extractor or SYMS extractor or xxxx brand but no more bubble sound liaw!
any one using after market extractor but still got strong bubble...