Scroll Switch - 199 Level Speed AdjustmentThis small fan adopts a scroll switch design, and the wind speed from 1 to 199 can be adjusted steplessly,The portable fan can customize speeds , meeting your various wind power needs in any scene.Intuitive Digital Display - Power Reminder The travel fan is equipped with a high-definition digital display screen, which can show the current wind speed and remaining battery power! With advanced battery management, you can plan ahead and keep your portable fan for travel charged for a refreshing companion wherever you go.How To Use1. Turn on the fan switch.2. Click the first touch button to adjust the mode (natural wind - soft wind - outdoor wind). Double-click the first touch button to view the power display (%), which will automatically switch to the gear after 3 seconds.3. Long touch the upper () button to continuously increase the gear by 1-199; touch the upper () button to switch the gear (30/60/90/150/199). Long touch the lower (V) button to continuously reduce the gear by 199-1; touch the lower (V) button to switch the gear (199/150/90/60/30). The power % will be displayed about 3 seconds after the fan adjusts the gear.4. Light mode: As the wind force increases, the light flashes faster.5. Charging reminder:Charging displays the power percentage; the power single digit flashes, and the full display 100% is always on.