THIS MACHINE BUILT-IN A 12 VOLT BATTERYTHE FIRST USE OF THE CHARGE EIGHT HOURSTHE MACHINE IS EQUIPPED WITH AN EXTERNAL DC INTERFACE WHEN DOCKING TO THE DISTINCTION BETWEEN POSITIVE AND NEGATIVE,IF THE COMPLETION OF CHARGING. PLEASE UNPLUG THE 220V POWER LINE PLUG.THE POWER INPUT VOLTAGE:220V/50HZ INSIDE:ONE WIRELESS MIC, INTRODUCTION PAPER,AUDIO CABLE, CAR CHARGER CABLE,CHARGING CABLE
