1. Reduction of noise. Extremely poor caliber. You will still hear sounds from outside even when the music is loud. 2. Implementation. unpleasant and unusable. You'll need to hunt for alternative headphones-setting software. 3. Errors. If your case is empty but your headphones are charged, for instance, they won't pair with your phone until the case is plugged into a power source. 4. Price. Summarizing, I can conclude that they are definitely not worth half of what they charge for them. My score is 3.
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