Product information:Connection method: Bluetooth connectionInterface type: USBFrequency response range; 20Hz-20KHzPower supply mode: built-in lithium batteryPlaying time: 2-3 hoursEffective distance: 10 metersShell material: plasticSpeaker adjustment method: buttonBox material; plasticColor: white, blue, black, red, goldPower supply mode; USBBuilt-in battery capacity: 500 mA-800 mABattery capacity: 500mahSize Information:Packing size 105*8.5*12.5MMSingle size 74*65*90MMPacking listWireless bluetooth speaker*1