OPOLAR F801B USB Operated Clip on Fan with Two Settings and Fully Adjustable Head Personal Cooling Fan Unique Base DesignClip and table desk type, perfect and portable fan for the office, home, dorm, study, library, games room and so on. 2200RPM rotate speed produces a strong airflow. Extremely compactConnects to any PC/laptop via USB, or can connect to a AC port with a USB AC adapter Fantastic 360 Degree Adjustment4 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 Enhanced Clamp-To offer the best clip fan, we have made many tests to ensure the clamp was strong enough to clip and stay put, even on a moving baby stroller One year replacement and 30 days & return One year warranty for defective units,60 days no-hassle refund & return and friendly customer support from OPOLAR