Xiaomi Mi True Wireless Earbuds Basic High-quality optimization of exclusive patent. This earphone features a ultra stylish design, exquisite workmanship, lightweight and portable, easy for you to carry. * BT5.0, speaker with Penetrating Sound: Provides crystal clear sound, you can enjoy your music world. Drivers for brisk sensitivity Driving dual rear chamber reverb, delivers crystal clear enjoyment. * Intelligent Noise Reduction: Quality audio with a streamlined aesthetic.Compact and High-Quality and bring an outstanding listening experience, fits home or outdoor activities. * In-ear ergonomic design: With soft silicone fish beak type earbud tips, directly lead the music into your ear cavity and isolate the outside noise, comfort your ears as well. * User-friendly controller: Integrated controls for volume adjustment, music play, and calls High blind control recognition, simple and quick one-hand control * A perfect gift for yourself or friend. BT version: V5.0 Protocol: HFP/A2DP/ HSP/AVRCP BT: BT5.0 Wireless Music and Calls BT Working Range: 15m Playback time: approx.4hr (Depends on making calls and volume) Standby time: approx.150hr Battery capacity(earphones): 40mAh Battery type: li-ion Battery capacity(charging case): 3.7V 300mAh Operation range: 10m(with no obstacle) Charging time: approx.2hr