Short press power ON, press + and - to adjust voltage,0.1V voltage adjust. Long press Power and "-" button together, If show B0 on the screen, that mean start-up function open.Long press Power and "-" button together, If show B1 on the screen, that mean start-up function off.? Big battery catacity 1100mAh, can use for about 5 hours.Specifications:Weight: 43gDiameter: 25mmLength: 77mmBattery Capacity: 1100mAhWorking Voltage: 5-12V