Mi Earbuds basic wireless BT headphones adopts BT 5.0 technology, bringing high-speed data transfer speed, stable performance and low power consumption, offering real-time transmission of call and games, no voice delay.  left and right ear channel separation. You can use the headset solely, or used them in pairs. Auto fast pairing between left and right earbuds. Easy and quick to pair with BT-enabled audio devices. Equipped with a 300mAh charging box to charge the earbuds for about 4 times, provides total 12 hours of working time. Built-in dual Microphone with noise reduction function delivers clearer and more real talking sound. Its mini size and 4.2g weight of each earphone fit well to your ear canal, and guarantee stability and comfort when doing sports.  Mi Earbuds will brings you perfect user experience.