Shoulders Bag 1. Bluetooth active noise reduction, professional noise reduction technology, 4 noise reduction chips specially configured for ANC module to canc noise. 2. Two phones can be connected at the same time 3. High-definition microphone, high-sensitivity silicon microphone, loud and clear volume 4. Qualcomm CSR millisecond Bluetooth chip 5. Subwoofer upgrade, increase and deepen the ear space structure, let the sound generate more airflow in a larger space, and enhance the b sound effect 6. The head beam curve design fits the head, suitable for long-term comfortable wearing 7. Use protein leather earmuffs to evenly distribute the wearing pressure, and achieve more stable wearing by increasing the area of the ear pads 8. Continuous battery life, talk for 12 hours or listen to 200 songs without power, which can meet the needs of daily listening and long-distance trav 9. Folding design, more convenient to carry 10. Playing time: 12 hours 11. Charging time: 3 hours 12. Standby time: 200 hours 13. Battery capacity: 500mAh