battery capacity: 1200mAhcan use a TF card.once full charge can use about 5 hours.Type: Bluetooth speakerConnection mode: Bluetooth connectionInterface type: USBBattery capacity: 800MAHFrequency response range: 100Hz-20KHzOutput power: 3WSignal to noise ratio: ≥ 75dbPower supply mode: built in lithium batteryChannel: 2.1Duration: 6 hoursExtended storage: 32GBBluetooth protocol: 5.0Number of speakers: 1Effective distance: 10MFunctions: card insertion, radio, dust proof, fall proof, voice prompt, call functionOperation mode: keyApplicable population: GeneralPlayback format: MP3, wma, wavShell material: plasticSupported format: USB flash disk