... with good bassCable groove which is easy for cable managementRechargeable Li-ion batterySpecificationItemMultimedia speakerSpecial FeaturePortable, MiniSpeaker4ohm, diameter:40mmLine Input3.5 stereo audio ... earphoneWorking Timeabout 10 Hours (medium volume, random music) Li Battery Capacity200mAHBattery Voltage3.7VBattery Charging Voltage4.2~5VFrequency Response130Hz~22KHzS ...