BT Version: QCC3003+AMS3415 5.0Speaker: 40mmFrequency: 2.4GHz-2.48GHzWorking distance: 10 metersNoise Cancellation Sensitivity: 21dB(±3dB)Battery: 500mAh Voltage: 3.7VTalk Time: ≥12HrsStandby Time: ≥200 days