Cummins Onan QD Diesel powered 8000 watt RV generator. Computer controlled variable speed operation matches engine speed to load demand, minimizing noise level. Special sound-controlling housing encloses the cooling system and muffler. Three-point fully focalized mounting system reduces vibration. Self-diagnostic capabilities simplify troubleshooting. Easy, accessible maintenance points. Runs two 15,000 Btu air conditioners with power to spare. High quality, pure sine wave electrical output helps prevent damage to appliances.