Type: Bluetooth speakerConnection method: Bluetooth connectionInterface type: USBBattery capacity: 350mahFrequency response range: 100HZ-20KHZOutput power: 3W signal-to-noise ratio ≥75dBPower supply mode: Built-in lithium batteryChannel: 1Playing time: 1Extended storage: 32GBBluetooth protocol: 4.0Number of speakers: 1Effective distance: 10 metersOperation method: buttonApplicable people: GeneralDisplay: NonePlayback format: MP3Shell material: metalWhether to support APP: NoSupported format: TF cardSpeaker adjustment method: button