Connection method: Bluetooth connectionInterface type: USBBattery capacity: 500Frequency response range: 100HZ-20KHZOutput power: 3WSignal to noise ratio: ≥75dBPower supply mode: Built-in lithium batteryExtended storage: not supportedBluetooth protocol: 5.0Number of speakers: 1Effective distance: 10 metersFunction: call functionOperation method: keyCabinet material: plastic + siliconeAppearance size: 65 * 62 * 75mm