This portable fan is made of high quality PC plastic, make the shell more smooth, and your hands less sweat when you held it outdoor. We set three different speed levels to meet your different needs. Brushless motor and four fan blades efficiently and quietly output cooling wind for you, slightly press the rounded button on the small fan to switch low/medium/high speed. We use 1200 mAh Lithium Ion battery as the power source of our hand held fan, fully charge this battery operated fan, up to 3 hours working time. Lightweight and portable body, you can use it on many occasions. Put it on the table, carry it on the bag, held it in your hands, it can serve you anytime