BT Version:5.0Speaker: 8mmFrequency: 2.4GHz-2.48GHzWorking distance: 10 metersSensitivity: 98±3dB at 1 KHzEarbud Battery:55mAhVoltage: 3.7V Charging Case Battery: 380mAhTalk Time: 6HrsStandby Time: ≥80Hrs