The swirl fans allow you to direct airflow upwards while resting on your chest. They concentrate the air more than a regular fan and you don't have to place the fans in front of your face. I can even feel the air on the back of my head. I got 2 hours on high speed, 3+ hours on medium and 5 hours on low speed. You can also charge and use at the same time. So you can plug into the battery and let it run much longer if you want. I live in Texas where it gets very hot and they keep my head and neck nice and cool. It will be more than 100f today and I have to work outside. I loaded it and ready to go.
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