... contain display of the Utility,Battery,Output,Fault,Saving Mode Power Capacity,Low Votlage,Charging Current,Battery; Saving ... Battery Life; Automatically and swiftly line to battery switch over; High Transfer time,below 4ms,it makes ... ManagerAutomatic Manager of Battery Charging,extend the Battery LifeBeepingInverter Mode,Beeping Sound or Slience OptionalEnvironmentalTemerature20oC ~ 45oCHumidity0% ~ ...