TWS BT5.0 Headphone: Wireless dual ear design, left and right ear channel are separated. You can use the headset solely, or used them in pairs. BT 5.0 brings high data transfer speed, stable connection and low power consumption. Fast & Easy Paring: Auto power on and fast pairing between left and right earbuds once opening the cover of the charging case. Easy and quick to pair with BT-enabled audio devices. Effective distance is about 10 meters in open space. Long Battery Life: 50mAh battery in each headphone ensures 4-5 hours of working time. 1000mAh charging box enables dual headsets charging for 9-10 times, extending the playback time up to 50 hours in total. Born for Sports: 4.3g lightweight and mini size fit well to your ear canal and provide you long time wearing comfort. It guarantees stability when doing sports. With charging box, easy to store and carry anywhere. Hands-free with Dual Mic: BT5.0 chip offers noise reduction function which grasps the detail of voice greatly. Built-in Mic on both earbuds delivers clearer and more real talking sound in stereo mode.