I?m so glad I did. And no, my ear canals dont have teeth (last time I checked) WE USE UV-C IN THE HOSPITAL SO I KNOW IT IS SUPPOSED TO BE A BRIGHT LIGHT. Parlando del prodotto in sé, le cuffie al tatto sono molto solide, delle giuste dimensioni e si adattano perfettamente allorecchio senza risultare ne scomode ne pesanti. So if youre doing curls, for example, you dont start to really feel it until youre maybe 1/3 the way through the range of motion and it gets progressively harder as you get towards the top of the rep. On one of the reviews I found out that the password was the serial number of the printer. The NC only removes lower frequencies and when you turn your head, blink your eyes or open your jaws, the NC gives off a weird wobbling pressure. The quality is really good for a no-name branded shoe. As an avid Batman fan, the hubby was super excited to get this case. But they are worth it!