In-ear Waterproof Bone Conduction Earphone Magnetic Charging Swimming Sports Bluetooth Earphone Features: 1. IP68 level completely waterproof, special earphones for swimming and sports 2. Open bone conduction technology, a good companion for sports and listening to music 3. Built-in 16G storage, Bluetooth + MP3 playback dual mode 4. Open ears, soft silicone, skin-friendly and comfortable 5. One-piece body, non-porous design, full coverage of waterproof materials 6. The high-frequency intelligent sounding motor is used, which can intelligently adjust the vibration frequency according to the song and transmit the sound through the vibration of the skull without loss. 7. Both ears are open, can maintain awareness of the surrounding environment, conduct sound through the ear bone 8. BT 5.1 smart continuous connection, BluetoothMP3 dual mode, support local playback 9. Light and stable, can not be thrown away, to meet the needs of sports in different occasions 10. Humanized design, streamlined design, compatible with glasses without boundaries 11. Magnetic charging method, fully enclosed structure design, flat interface without dead ends, rain and sweat can not penetrate, greatly improved waterproof performance 12. Quick blind operation with one hand, intimate voice prompts, easy switching modes and song selection Parameter: 1. Bluetooth version: BT 5.1 2. Bluetooth effective distance: about 15 meters 3. Waterproof grade: IP68 4. Charging time: about 1.5 hours 5. Battery capacity: 3.7V 160mah 6. Music time: 5 hours 7. Talk time: 4 hours 8. Memory capacity: 16GB memory card 9. Function: call function, support music 10. How to use: ear-mounted 11. Chip type: Jerry