Thankfully I had a friend who also collects vinyl help me figure everything out and purchase the needed parts. I use it in the office, I can pretty much leave my phone at my desk and walk around the 11th floor suite and still have good reception. Oh, and if you have to say something privately, you can just make a microphone On/Off button. But, to my surprise, it was an illusion because it slipped right on and fit my daughter’s feet perfectly! Very disappointed with the slippers. My sons ear pads were pretty much shot after years of use. Love this loafer, got a great deal for this, so it was a no brainer. I tested on laptop, Android TV box and iPhone and result were very good without facing any issue. These slippers are great value for 2 pairs, better value than buying a single pair of same from other sellers. He was having trouble with his feet and legs - swollen feet and weeping leg.