Adjustable 2 Speeds --- With 2 blades, creates airflow to keep you cool and relaxed. Adjust the fan speed by pressing the power button repeatedly (speed 1 lasts 4 hours, speed 2 2.5-3 hours when fully charged) Convenient USB charging - -- Can be used for sleeping, working, eating at home, office or school by connecting to PC/laptop via USB or connecting to AC port with USB power adapter It is a better gift for family, friends, co-workers and teachers. Mini Size, Portable and Foldable --- 270 degree foldable, small enough to fit in pocket or bag, laptop pocket or as a desk stand. To prevent the fan from rolling backwards when it is rotated on the table, please do not place it in a very smooth place. Soft Blades --- When the hand touches the rotating fan, the fan stops working and hand feels very slight pain (NO HURT). Please be careful when using, in case it gets scratched by the blades. Children under 10 advise not to put their hands in the fan to avoid scratching.