Product details：

*Bluetooth name: A11 Pro *Bluetooth version: V5.4 *Protocol Support: A2DP/AVRCP/HFP/HSP *RF Frequency:2.402GHz-2.480GHz *Sensitivity: < -86dBm *Bluetooth range: 10meter *Driver:Φ13mm,  32±15% ohm *Frequency response: 100Hz～20KHz *Earphone Battery: 30mah *Earphone box battery: 300mah, *Music time: 5hours *Talk time: 3.5hours *Total: 17 hours *Charging time: 1hours for earphone *Package:paper box, instruction, lanyard, charing cable, earphones