Lots of "Power" or fan speed options and very good battery life. I mostly used this no higher than power level 4 and it was adequate even in 35 degree Fahrenheit situations. Sometimes used at level 5. At level 3 or 4 this fan ran for hours. I never measured it, but I was very happy with it. Bought two and overall very happy. A nice feature, but I wish it was better. Adjust the position where you want the two fans to be under my face and stay where I placed them. When I'm stationary it's not a problem, but when I'm active it can swing left or right and move the fans away from the forward position. It would be five stars if this was improved and more stable for active use. If someone leaves, no problem. Running, jumping, lots of side to side movement, not much.
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