I've bought at least a dozen of these over the last ten years. I now have two unopened spares. They last a long time. I use them at least 6, sometimes 8 or 10 hours a week. They work perfectly with my iPhone 12, Chromebook, Macbook and my work computer with Windows 8. They just work. I have small ears and other in-ear headphones often hurt quite a bit. They're comfortable and come with multiple rubber tips, so if you have big ears; you will find the right one. I've always used them with an adapter when using my iPhone and haven't had any problems. The sound is excellent (classical, popular music and audio books).
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