BT version: V5.3, Transmission Distance:10M, Battery Capacity: 30mAh, Playing Time: About 5 hours (earbuds), Charging Time: About 1.5hours (earbuds), Upgraded bluetooth 5.3 chip ensures stable and fast connection, low power consumption and low latency. Adopt 13mm dual-frequency moving coil unit, high frequency analysis, restore sound details without distortion. After the first pairing, just take the earbuds out of the charging case, the earbuds will automatically connect with your mobile phone. Semi-in-ear design, fit the ear canal, bringing comfortable wearing experience. Built-in microphone, AAC/SBC audio decoding, clear sound quality. Multifunction Touch control. Widely compatible with BT-enabled phone, tablet, laptop, etc.