... current6A6A6A6A6A6A6A6A6A Panel indication LCDInput,oupt,battery voltage,frequency,load rate,UPS state, temperature LEDMain input , bypass,Inverter,Battery,Over load ... Efficiency Whole unit85% Communication1.Power status 2.UPS shutdown 3.monitor UPS status 4.UPS self test 5.auto-save files Protection ... 55db (at 1 meter) Environment Temperature0--40 °C Humidity0%-95% Low Frequency Online UPS TA2K-20K