[Multipurpose power supply] Dual fuel design runs on both gasoline (3500 surge watts, 3200 rated watts) and propane (3100 surge watts, 2800 rated watts). Easily runs a small house lighting system or an RV's 15k air conditioning unit or other equipment like the refrigerator and more needs [Easy Start]Provides two start modes to choose from electric start and recoil start, quick start technology ensures that the machine is ready to work within seconds. [Extra-long run time] While using Eco mode you can extend your run times. Approximately 6.5h(Gas) or 13.5h(LPG) at 50% load. [Low noise] 4-stroke 145cc OHV, air-cooled engine provides extremely quiet operation (62 dBA at quarter load, 22 feet), which is almost equal to the sound made during normal conversation or a running dishwasher.