Mi True Wireless Earphones 2 feature a 14.2 mm large speaker with a large composite dynamic coil. The bass is full and deep, the mid-range is soft and natural, while the high-frequency sounds are bright and clear. Clearer sound and exquisite, full detail. Restoring sound details brings you a more pleasant sound experience. Mi True Wireless Earphones 2 are customized with MIUI. After the first connection, when you open the charging case, a pop-up window will automatically open for Bluetooth pairing. Connecting is easier and you can check the headset and charging case power. Fast, automatic pairing, no waiting time required. The dual-microphone employs integrated environmental noise reduction technology, which will also ensure high-definition voice recognition and call quality. LHDC Bluetooth high definition tone technology achieves near perfect sound performance and quality. The built-in infrared sensor can detect whether you're wearing the earphones in real time. It senses when you put them in, and playback will automatically pause when they’re removed. Whether you're watching a movie or listening to music, you won't miss a single frame or note. Tap the earphones to control the music, call, activate voice assistant, etc. They can be operated easily without a mobile phone. The earphone set is automatically charged in the charging case. Both the set and the storage case support fast charging, which will ensure a full charge within one hour. Playback lasts about four hours. When used with a charging case, the overall battery life can go up to 14 hours. Long battery life allows your music to stay with you for longer. With the Bluetooth 5.0* microchip, you will obtain a more stable wireless connection, faster transmission speeds, and stronger compatibility, bringing you high-quality audio and a clearer call experience.