1. Drive: 40mm 2. Impedance: 32 OHM 3. Bluetooth version: Bluetooth V5.0 4. Bluetooth frequency band: 2.4ghz 5. Power level: CLASS II 6. Bluetooth range: barrier-free 10 meters 7. Frequency response: 20-20,000 Hz 8. Have A2DP /AVRCP high quality stereo audio transmission and remote control protocol 9. Charging time is about 2 hours (power indicator charging: red light on, full charge: red light off (blue light).) 10. Talk time is about 8-10 hours 11. Music lasts about 8-10 hours 12. Standby time is about 120 hours 13. Battery capacity 250MAH+ protection plate 14. Charging power: DC5V power [round port] (COMPUTER USB port, mobile phone charger, car charger) 15. Compatible mobile phone: Compatible with android, Apple, Microsoft, Symbian system with 99% bluetooth function mobile phone
