Includes Flexible oil funnel, wheel kit, USB adapter, and battery charging cables. Engine Oil Capacity 1.2 qt. From 23 feet, this inverter operates at 69 dBA, about as loud as a vacuum cleaner. Champion 100519 6250-watt dh series open frame inverter with quiet technology the champion power equipment 100519 6250-watt digital hybrid open frame inverter generator is 50% quieter and 20% lighter than a traditional 5000-watt portable generator.