I had to remark here on these Aukeys for those who may be considering a wireless pair of phones. I can say at least with the Nox 600 these B80's work great! I go to the park, pull the suspenders with all I carry afttached and throw em on. Then pull the Aukeys out of the pocket alongside the backpack I carry all in. (Backpack stays in the van) the detector, Nox 600, is turned on and all I have to do is turn on the earbuds and in about 10 seconds maybe less they pair to the detector. Done. the Nox bluetooth stays on the way I left it. They just work and is so easy. Before I purchased the Aukeys I thought well on it because I figured it's going to be time screwing around with them getting them setup everytime out. I'm very pleased it's not any time lost at all. In fact I bet it's faster than settling up wired headphones. Once detecting I quickly forget the buds are on, they feel fine. Sound is good. If you're thinking about these, for the money, you can't go wrong. I have no affiliation with anyone selling them or a company that makes and sells them. I'm just a retired guy whos giving a review here in the FMDF where it's useful. I was thinking about saying something cause I enjoyed the Aukeys so much lately. HH and GLuck.