The signal and volume were excellent, the battery charging was easy and quick, the batteries lasted long, and having the freedom to move about the space was so great for the kids. Ill keep looking. I could go on and on, but those were the ones I considered deeply. After buying a piece of crap from Amazon which was returned today. Parametric EQ uses three parameters: Fc (center frequency), Gain, and BW (bandwidth). Even after thoroughly cleaning it with a microfiber cloth and a especial liquid to remove grease it has few small spots that seem permanently "tainted", and thats just after a month of use. Can be worn during yoga or Martial Arts practice, as well to pool side or even into the pool! Non invasive colour if you what I mean! Edit: after few hours break in, sound characteristic changed slightly still rather too much bass, but trebles open up a bit though not as sparkly in comparison to similar headphone at this price range. That is why there comfort only got a 3 out of 5 stars.