... /450Watts,AVR, CPU control,SMT PCB, LCD display,USB,4 battery backup &2 surge protection ... Range(Normal Mode)220/230/240/110/120Vac+10%-15%Output Voltage Range(Battery Mode)220/230 ... /240/110/120Vac±10%Output Frequency(Normal Mode)Synchronized(Sine Wave)Output ... MinutesHalf Load 6.0 MinutesCharge Time12 Hours(90%)LCD Status DisplayNormal,Fault,Battery,Charge,Overload,Load,Battery ...