Heavy-duty model, engine capable of combusting both petrol and liquid propane-butane and gaseous natural gas. The use of LPG/NG as fuel saves the engine and extends its service life as combustion of cleaner fuels results in less engine wear and better lubrication. Offers sufficient power input for most one-phase machines and appliances. Maximum/operating output when fuelled by petrol 5.0/4.7 kW, LPG 4.8/4.4 kW and CNG 4.6/4.1 kW. Synchronous generator produces AC and DC current, max. speed of the four-stroke one-cylinder engine: 4000 rpm. Acoustic pressure/output 76/108 dB(A).