... LED display,contain display of the Utility,Battery,Output,Fault,Saving Mode Power Capacity,Low ... Current are adjustable,it extends Battery Life; Automatically and swiftly line to battery switch over; High Transfer time, ... 60Hz Optional,CPU ControlBattery ManagerAutomatic Manager of Battery Charging,extend the Battery LifeBeepingInverter Mode,Beeping Sound or Slience OptionalEnvironmentalTemerature ...