I had JBLS so I decided that getting the same brand was a good idea, these earphones are great, good sound, good features. Estoy muy complacida. I include the video to show even at the tightest the arms just wont hold up the foam isolation screen and the mic. Amazon Basics has done it again with another great product at an affordable price. ???????????? When one side of the heaphone did not work, I contacted the seller. I did the same process using about 2 capfuls per gallon of cold water and let the sweater sit overnight, however, this shampoo (it?s sudsy and soapy), requires rinsing. Once that has been done successful these IEMs really open up the music inside your head. The only snag is the sizing: the first two pairs were fine, the next from a different supplier were much too small although I ordered the same size apparently. I dont know what the distance rating is because the user manual sucks, but I can walk all over my 1200sq/ft apartment and to the mailbox outside without the BT connection dropping out.