SKYSONIC , 5000mAh Battery Powered [4 Speeds, 20 Hours Runtime] One-Touch Off Switch, Collapsible USB Desk Fan for Travel

5000mAh Rechargeable Battery - Up to 20 Hours of Operation. Comes with a built-in battery for straightforward charging. Offers 4-20 hours of use without cords. Its portable, foldable design makes it easy to carry and store in any bag or purse. Low Battery Alert---Charge When Needed. The fan notifies you of low battery. Press the power button to check remaining charge. Indicators show: 1) 3 lights: fully charged; 2) 2 lights: 60% remaining; 3) 1 light: 30% left. (Note: Indicator flashes during charging, stays lit when fully charged.) Advanced One-Button Off Feature. This fan uniquely offers a single-button shutdown. Press and hold for 3 seconds to turn off, simplifying operation. Upgraded to 4 Speed Options: From the standard 3 to 4 settings. Speed 1 for indoor relaxation; Speed 2 for everyday indoor use; Speed 3 for activities shopping; Speed 4 for events such picnics or camping. Detachable Fan Guard for Easy Cleaning. Rotate clockwise to remove, counterclockwise to reattach. Cleaning the guard after extended use removes dust, enhancing durability.