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.
Did you know turbocharger works as a mechanical sensor for the engine... how??
which mean when it damage,it can tell us what actually happen inside (by turbo post postmortem) the engine or what made the turbo...