Product information:Type: Bluetooth speakerConnection method: Bluetooth connectionInterface type: USBBattery capacity: 1000 mAhFrequency response range: 40HZ-20KHZOutput power: 5WSignal to noise ratio: ≥75dBPower supply mode: built-in lithium batteryChannel: 2Playing time: 8 hoursExpansion storage: 16GBBluetooth protocol: 5.0Number of speakers: 2Effective distance: 10 metersFunction: insert card, call functionOperation mode: buttonApplicable people: GeneralShell material: PlasticSpeaker adjustment method: buttonAppearance size: 112*105*57mmPower supply mode: USBColor: white, pink, green