Two fuel sources - With either LPG (Propane) or gas, you??ve got two energy sources to deliver higher efficiency, easier use, and fewer emissions. Part of the EcoFlow Ecosystem - Set it to charge your DELTA Pro/Max or Power Kits automatically when they drop to a certain level. All while having higher charging efficiency. Smart control & monitoring - Use the EcoFlow app to control and monitor from afar. Stay in the know - With 5 alert methods, including carbon monoxide alerts, you??re always in the know. Seamless LPG set up - Plug in propane easier than ever with a switch & built-in regulator EcoFlow DELTA Pro to Smart Generator Adapter?(sold separately) is necessary when the DELTA Pro is connected to the Smart Generator (Dual Fuel). Learn more about DELTA Pro bundle>> Learn more about DELTA Max bundle>> Learn more about Power Kits bundle>>