It is highly desirable to immediately ate the firmware in the headphones to the latest version, otherwise autonomy suffers greatly. Before the ate, my ears did not live for more than 2 hours on a single charge. Its pros: High-quality sound, high battery life (ears + case), a very rich set of ear cushions (8 pairs), decent noise reduction at this price Its cons: The application is only in Chinese, the first time you will have to set it up with translators or online instructions.