1. Noise reduction. Very mediocre quality. Even with loud music, you will hear sounds from outside. 2. Application. Non-functional, uncomfortable. You will have to look for alternative applications for setting headphones. 3. Glitches. For example, if your case is empty, but the headphones are charged, then they refuse to pair with the phone until the case is connected to a power source. 4. Price. Summarizing, I can say that they are definitely not worth half of what they ask for them. My rating is 3-
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