I have used these headphones in various situations and scenarios. The microphone is pretty good and the multifunction button works as expected. Several phone calls were made and the other end said I was speaking clearly. Using it with Spotify found the mids a bit low, but overall the sound is phenomenal for this price point. I've tried countless in-ear and in-ear headphones and have never come across headphones that sound as good as these. However, for a professional sound setup I have to recommend a different type for maximum tuning precision, but using it as a monitor when mixing live music is VERY acceptable. The folding feature is ok and not really too much for my use, but a small case will suffice for portability. The last app was used with a phone without an audio jack. , so I connected them to a Bluetooth receiver and the audio was about 10% quieter, but that's mostly due to Rx. If I saw this product on a shelf in a store I would definitely buy it again. PERFECT FOR KIDS AND MOBILE AUDIO like Spotify and YouTube.
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