Problems solved right out of the box. Grainy noise, sometimes the headphones didn't work. Then, after a few weeks of moderate use, one earbud stopped working. A week later, the second also gave up. I used to buy cheap bluetooth headphones but they lasted a year not a month. DO NOT! There are also very strange announcements like "Welcome using" at startup and "There is a phone" when someone calls. It's pretty funny, but also very annoying. Survived about 5-7 hours when working. Just buy something else. One more thing. Two cans and a rope could work better and more reliably (although probably without Bluetooth).
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