A8 Gaming Wireless Headset Stereo Over Ear Wired Microphone Headphone 1. Bluetooth version: V5.1 2. Bluetooth use frequency band: 2.4GHz 3. Power level: CLASS II 4. Bluetooth distance: 10 m 5. Frequency response: 20-20000Hz 6. Sensitivity: -42dB 7. Speaker: 40MM 8. Battery capacity: 400MAH 9. Talkmusic time: 45 hours 10. Battery life: 35 hours 11. Charging time: 2.5 hours 12. Talk time: 20 hours 13. Music time: 20 hours 14. Power supply voltage: 3-4.2V 15. Charging time: 2.5 hours 16. High fidelity quality, pluggable microphone, protein leather earmuffs, all-in-ear noise reduction, cool lights, long battery life 17. Sturdy structure, foldable design, easy to carry 18. Play the game freely, no delay, clear hearing 19. Multi-angle foldable adjustment 20. Colorful atmosphere breathing lights on both sides, fine workmanship 21. Multiple play modes: TF card, AUX, game mode 22. Sturdy headband retractable stainless steel, flexible adjustment, suitable for all heads 23. Wearing sponge protection for a long time without getting tired