Bluetooth version: V4.0Working Range Up to 10mWorking Time 10 hoursDimension 60*60*50mmNet Weight 230gSpeaker 45mm Loudspeaker Output 5wFrequency Response 280hz-16khzSignal to Noise 95dBDistortion 0.5%Battery Voltage/Capacity 820mah Battery Charging Voltage 5v / 0.5vBattery Charging Time 2 hours