1. Drive: 40mm 2. Impedance: 32 OHM 3. Bluetooth version: V5.0 4. Bluetooth frequency band: 2.4GHz 5. Power level: Class II 6. Bluetooth distance: barrier-free 10 meters 7. Frequency response: 20-20000Hz 8. With A2DP/AVRCP high quality stereo audio transmission and remote control protocol 9. Charging time is about 1 hour 10. Talk time is about 10-12 hours time 11. The music is about 2-3 hours 12. Standby time is about 120 hours 13. Battery capacity 400mAh / 250mAh 14. Power charging: DC 5V power supply [round hole interface] (computer USB port, mobile phone charger, car charger) 15. Compatible mobile phone: compatible with Android, Apple, Microsoft, Saipan system 99% of mobile phones with Bluetooth function
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