For robotic vacuum cleaners that are compatible with the ZACOHome app, the speed of the side brushes can be adjusted. For very fine dust, a faster speed is more suitable, and for coarser dirt, a low side brush speed. To change the speed, click on your robot in the app and then on the three bars in the upper right corner. From there you will be taken to the settings page, where you can choose between 1% and 100% under "Side brush speed". For normal house cleaning, we recommend a speed of about 20%.