Great sound with 14.2mm driver and AAC codec.Long battery life of 20 hours* allows you to use it from morning till night.*Earphone endurance data: when the earphones are fully charged, and the volume is turned to 50% (smartphone), they can be used for up to 5 hours. When the earphones and charging case are fully charged, music can be played continuously for about 20 hours. Specific usable times may vary depending on the conditions of usage.Each earphone is equipped with two built-in high-sensitivity microphones, which use beamforming technology to eliminate the background noise during calls, allowing the other user to hear you clearly, even in noisy environments.The dynamic driver with a 14.2mm large composite diaphragm is used to make the sound fuller and richer with a more natural feel, restoring more real texture and details. At the same time, AAC audio codec technology is supported to improve the audio quality and experience, providing users with clear sounding audio. Wearing detection* pauses when the earphones are taken out ,,Simultaneous transmission for both ears* results in smoother gaming and an enhanced audiovisual experience.