Specification:Music Playtime with Single Charge4hrsPlaytime from Charging Case20hrsBluetooth Versionv5.0Bluetooth Range10mEarbuds Battery Capacity40mAh 3.7V (0.148Wh)Charging Case Capacity500mAh 3.7V (1.85Wh)Charging PortUSB Type CBluetooth ProtocolHSP, HFP, AVRCP, A2DPFrequency Response Range20Hz-20KHzSpeaker Sensitivity102±3dBCharging Case Output5V=100mAWarranty1 year 3 months brand warranty
