Mine showed up today . they paired up quickly and were almost fully charged from the box. First thing I always do with in ear types is change to the largest in ear pieces for a better fit, better surrounding sound deadening and most importantly better bass response. They didn't budge when I turned my head slowly, quickly, sweating and not sweating and that was with the cord in back as well as my usual in front.
I put on some Oingo Boingo because they play dad burn every instrument invented, they're stuff is usually mixed nicely for a more neutral but leaning slightly to the bright side and their singers range from deep baritone to upper male ranges. They were a little on the muffled side so I changed to some Doobie Brothers, again same reasoning but mixed a little brighter as a general rule and they sounded about what I like so I tried Paul Hardcastle next and it seemed awesome in the bass mids and vocals but the uppers (like hihats) seemed muffled. Nothing an eq tweak in Power Amp can't fix overall.
They sound tons more true to me than my Jaybirds ever did, stereo separation is much wider and more "airy" for a more outdoor amphitheater feel on songs like Funkyard, limitless and Crazy.
Volume is loud, uncomfortably so when the phone and earpieces were half or more but there was no distortion even in deep bass passages and treble never got that harshness that the beginning of distorting brings.
Range was as good as anything else I've got and better than some. I could easily go 20+ feet away from the phone and turn 1 corner, over 30' if in line of sight and like everything else Bluetooth I've got they began to break up, even at 20' when turning more than 1 corner.
They did suffer randomly from wow and flutter (music speeding up and/or slowing down), something I've only experienced in 1 other pair of stereo Bluetooth headphones years ago (the Jabra 620S) but only randomly and not as bad.
My only real gripe was when used for phone calls (got 2 calls from 2 of my daughters) they couldn't make out what I was saying so much so I turned them off and went to using the phone. No biggie since I use my phone as a phone very very seldom.
Time will tell the battery life
I'd have paid much more than the $10 they asked for these things.
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