1. Bluetooth version: V5.3 2. Supported Bluetooth protocols: A2DP/AVCTP/AVDTP/AVRCP/HFP/SPP 3. Control mode: capacitive touch 4. Channel system: stereo 5. Working frequency: 2.402GHz-2.480GHz 6. Sensitivity: -90dBm 7. Effective distance: about 10m 8. Signal-to-noise ratio: about 102dB 9. Speaker unit: 10mm 10. Headphone battery: 40mAh/3.7Vx2 11. Music time: about 6h 12. Talk time: about 5h 13. Headphone charging time: about 2h 14. Charging box battery: 320mAh/3.7V 15. Charging time: about 2h 16. The number of times the charging box can charge the headphones: about 5 times 17. Built-in high-sensitivity microphone, accurately pick up human voice, effectively reduce environmental noise 18. New antenna design, stable signal connection, 0.05 second low latency 19. Ergonomic design, comfortable to wear, stable and not easy to fall off 20. Type-C charging port, more convenient to plug in both directions, strong compatibility