1. Automatic second connection.
2. bluetooth 5.0, the connection is more stable.
3. 12h long battery life, with charging box.
4. Double-ear multifunction button, anti-missing.
5. Summon voice assistant, voice control mobile phone.
6. Comfortable to wear, self-adjusting, not easy to fall off.
7. IPX4 waterproof, no fear of rain and sweat.