You can take down the front cover of the desktop fan by turning it counterclockwise to wipe off the dust align the groove and turn it clockwise to reinstall. Once the cover is tightened, it will not loosen easily, ensuring your safety while using. Anti-slip mats on the bottom allow the mini desk fan to stand steadily, not moving an inch or flipping over even on the high level. With a brushless motor, this fan has a longer lifespan than others. Premium USB Fan n with high quality works ultra-quietly and brings you a strong wind at both home and office. A sturdy metal fan produces a soft breeze to keep you cool and relaxed. you can adjust to any angle to meet different needs. This USB Fan set is incredibly comfortable and budget-friendly. Nice gift choice for birthday, Children's Day, Halloween, Christmas, New Year. Best for any room in your house - bedroom, guest room, kids room, RV, vacation home. SPECIFICATION: Gear:4 Speed Gear Product Weight:850g Charging Input:5V/1A Power Consumption: 5W Feature: Product for Baby Battery Capacity:6000mAh Charging Time: About 5 Hours Control Methods: Touch Control Feature2: Temperature Display Fans Feature4: Portable Fan for Home Office