compact and Lightweight: 120mm usb computer fan with 4.7inch body, The dimension of fan: 4.7 x 4.7 x 1.6 in /12 x 12x 4 cm, It doesn’t take too much space on your desk or any surface you’re going to use, allows the fans to be laid flat or stand upright, 3-feet cord help move the mini fan around your device Three-Speed Airflow: The portable fan has 3 modes to get the air flow exactly how you want it: Low, Medium and High; High speed is powerful, moves a lot of air, and cools your electronic device off quickly; Low speed is very Quiet 5v Powered Fan: The fan is powered by USB and compatible with PC/laptop, power bank, AC adapter, wall charger and other USB-enabled power supply Applications: Heat being the enemy of electronics, I'm a firm believer in using cooling fans wherever practical,use this fan to keep your equipment cool extends it's life Adjustable speeds: Adjustable speed to meet your various cooling demand. Low speed: 1100rpm; Medium speed: 1300rpm; High Speed: 1500rpm