... Wave, portable, highly stable & constant voltage with "clean power", super quiet, fuel efficient, low emission... Ideal for TV, lights, fans, small ... stable&constant voltage with" clean power"Extremely compact and lightweightSuper Quiet operation <58dBFuel efficient, saving around 50%Low emission5 hours continious ... units/20ft; 960 units/40'HQ 1.0Kva Silent Digital Inverter Generator