They have the best sound quality from several Airtube headphones I've tried. I'm a musician, so the sound is important. These headphones reproduce high, medium and low frequencies. The only issue I had was that they didn't stay in my ears very well even after resizing, but I finally managed to get them to stay in my ears. The problem with Airtubes is that the plastic tube doesn't move, so the earbuds tend to slip out when you move them. There's also no volume control on the handset on the ear cord. One click stops the currently playing video/music and two clicks go to the next video/song. There's also a built-in microphone if you need to record or make calls. I used Airtubes DefenderShield for a year and while they were expensive the sound quality was excellent. But I had the same problem with them staying in my ears despite all their headphone sizes. They quit after a year. I wasn't able to purchase a warranty so I had no luck with this replacement for my new purchase of these Aircom Airtubes after reading several third party reviews. I use airtubes because I have tinnitus and I know the electrical signals in my ears are not good for it. Despite the T-ringing in the brain, I still won't use regular headphones or Bluetooth due to possible irritation/inflammation from the electrical frequencies. . Highly recommended
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