Review on Hand Mini Fan: EasyAcc Personal Fan for Hot Flashes with 17-Hour Battery Life, Strong Winds, and Convenient Lanyard - Perfect for Makeup, Travel, Shopping, Hiking (Black) by Jessica Hall

This little fan is really awesome! I live in Florida where the weather is hot and muggy most of the year and this fan is a life saver. I was stunned the first time I used it because the cold air this thing puts out is awesome. I think it could be a blade design consisting of three large and three small blades, each with some sort of curvature and tilted at just the right angle to create a wonderful cooling airflow.