Two gears can be adjusted,-gear for natural wind, second gear for strong wind, universal USB interface, easy to use at any time. The spiral agitates the air and circulates the air at a second speed, driving the airflow in the room horizontally and comfortably. Free rotation in all directions accelerates the air flow in the room and circulates the fresh air throughout the house. Features: Name: USB Desktop Fan Power: 2-2.5W Maximum speed of first gear: 2000-2500 rpm Material: environmentally friendly ABS Voltage: 5V Maximum speed in second gear: 3000-3500 rpm