1. Binaural stereo high-definition voice
2. Small and easy to carry, comfortable to wear
3. IPX4 waterproof
4. Bluetooth 5.0, 10 meters transmission distance
5. Bluetooth protocol: HFP/A2DP/HSP/AVRCP
6. Headphone battery capacity: 40mAh
7. Charging box battery capacity: 800mAh
8. Music time: about 4 hours
9. Standby time: about 120 hours
10. Charging time: about 2 hours