Parameters: Bluetooth: BT 4.0 Working voltage: 3.7VDistortion: 1%Speaker: 32⒢Charging voltage: DC 5VFrequency response: 20Hz-20kHzSignal to noise ratio: 75dBCall duration: 6hMusic player: 8hStandby time: ∫ 30 daysCharging time: 5h<br />Package included: 1