ItemSPECIFICATIONStandardBluetooth wirelesstechnologyV2.0DataRateUpto1MbpsRadioFrequencyBand2402~2480MHzModulationmethodGFSK(GaussianFrequencyShiftKeying)Receivingsensitivity 78dBm@0.1%BERRFOutputPower-3dBm~+2dBm,class2SpreadSpectrumFrequencyHoppingSpreadSpectrum(FHSS),79channels,1600hops/secOperatingDistanceUpto10meters(inopenspace)BatteryRechargeable420mAhLithiumPolymerbatteryChargerPowerSupplyUSB5VChargingTime2hoursOperationVoltage3.7VOperationtimeover5hoursConnectionswitchingBetween1stereoplayerand1phoneOperationTemperature-20~+60℃DimensionWeightProfilessupportedA2DP(AdvancedAudioDistributionProfile),AVRCP(AudioVideoRemoteControlProfile),HSP(HeadsetProfile),HFP(Hands-freeProfile)