Huawei's wireless Bluetooth earphones are designed for active individuals. Take advantage of automatic on/off and connect/disconnect features to enjoy the full wireless experience. When the earbuds are in your ears and when you remove them, an auto-wearing sensor can detect it. The Huawei Freebuds' sturdy design makes them impervious to perspiration and moisture. Each earbud has a G-sensor that lets you double-tap to control calls and music. No matter how intense your workout is, an ergonomic design guarantees a secure fit. Provide realistic, high-resolution audio with robust noise cancellation. uses four microphones and ENC technology to enhance voice quality for a conversation that is crystal clear. With deep bass, dynamic drivers with independent equalization produce a clear, organic sound.