Lithium-Ion Battery Operated- Powered by a reliable Lithium-Ion battery, this fan provides versatile runtime options for different settings. You can also enjoy unlimited run time while the fan is plugged into the adapter. If the fan is unplugged and operating solely on battery power, you can anticipate approximately 2 hours on turbo speed, 4 hours on high speed, 12 hours on medium speed, and an impressive 19 hours on low speed, on a full charge. Dual Power Options- Use the fan even when it's charging! The power cord can run the fan and charge the battery at the same time. Indoor/Outdoor use- Can be used in covered areas like porches or screen rooms, as well as while camping, at the pool, at sports events, on a boat, at the beach, on a deck, in a travel trailer/RV, and wherever else you might need a breeze. This fan's portable design allows for easy transportation and placement wherever you need it, and its strong airflow is great at keeping the bugs away when you're outdoors. UV Resistant Material- This fan is UV protected to withstand the sun without fading, ETL outdoor rated. Rotation Feature- Rotates left to right for full room coverage. The Airvana Bladeless Rechargeable Indoor/Outdoor Fan will keep you cool and comfortable wherever you are indoors or out. Beat the heat with this portable cooling option with it’s on the go design. Powered by an AC Adapter and built in lithium battery, you'll have the cool air you need with a continuous run time of up to 19 hours. Recharging is a breeze too; it can be recharged in 2 hours. A powerful current of air will make those hot days delightful whether you have an outlet nearby or not.