Used with the charging box, it has 20 hours of battery life, which can be used from morning to night.Dual microphones reduce noise during calls without fear of interferenceEach earphone has two built-in high-sensitivity microphones that use beamforming technology to eliminate background noise during calls, allowing the other party to hear your voice clearly and have clear calls in noisy environments.Xiaomi's true wireless Bluetooth headset Air2 SE is deeply customized with MIUI. When you open the charging box, the headset connection interface will pop up on your phone, making the visual operation more convenient. After connecting, you can check the power of the headset and charging box.Using a 14.2mm large-size composite diaphragm dynamic unit, the sound is fuller and richer, with a natural listening experience, and restores more real texture and details. At the same time, it supports AAC audio codec technology, which brings audible sound quality improvement and experience, and you can enjoy the beautiful sound.It adopts a semi-in-ear wearing design to better fit the ear canal, giving both ears a stable and comfortable wearing experience from the inside to the outside. The single-sided earphone only weighs 4.7g. The compact and lightweight body makes it easier to wear and greatly reduces the fatigue of long-term wearing. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.