Keynice USB Clip Desk Personal Fan, Table Fans,Clip on Fan,2 in 1 Applications, Strong Wind, 2 in 1 Applications, Strong Wind, 4 Inch 2 Speed Portable Cooling Fan USB Powered by Netbook, PC Clip and table desk type, perfect fan for the office, home, dorm, study, library, games room It is extremely compact, connects to any PC/laptop via USB, or can connect to a AC port with a USB AC adapter With quiet operation, you can keep this by your bedside and sleep comfortably without the noise bothering you 4 inch blade and 6 inch frame saves your desk space; adjust the direction of the wind with 360 up and down, left and right adjustment, you can enjoy the cool wind from any directions This fan powered by USB,connects to any PC/laptop via USB or can connect to a AC port with a USB AC adapter