... voltage & power range, CE,E-MARK,FCC,EMC,ROHS certificated Modified Sine Wave Inverters NBM 6000W1. Automatic protection against ... overload, over temperature and low/high battery conditions2. Two, three-prong grounded AC outlet3. Built-in Cooling Fan4. Power ... ±4Hz50±4Hz60±4Hz50±4HzMax Outer Temperature<650C<650CMax Power Efficiency>85%>85%High Voltage Cut Off Level15 ...