Comfortable to wear without any burden. Sensorless wearing | High definition calling. Directional sound transmission technology. Clear in-ear sound without leakage. Al intelligent noise eduction. Anti wind noise high -definition call. Rebound technology adheres to the auricle. Hi-Fi level sound quality. Bluetooth version: 5.4. Charging port: Type-C. Earphone battery capacity: 40mAh ｜ Battery capacity: 220mAh. Transmission distance: 10m. Talk time: 4h  | Play time: about 5 hours (medium volume)