There are four speed-adjustable gears on this tiny bladeless shaking head fan. The duration of the first gear plus head shaking is four hours; the second gear plus head shaking is three and a half hours; the third gear plus head shaking is three and a half hours; A 3600mah large-capacity lithium battery, which is extremely effective and energy-efficient, is integrated into this fan. It has a 3.5-hour battery life and is wirelessly functional. Because of its biomimetic properties, jellyfish tentacles can be held, standing, hanging, and winding, all of which are very practical. This tiny leafless fan features an ultra-wide air supply, a 130° wide-angle automatic shaking head, and a cool breeze that lingers in various areas of the spacious room.