DREO Tower Fan Family. Easy to Clean and Safe to Use: Removable rear grille and impeller wheel make cleaning more accessible. Max Speed 28 ft/s 33 ft/s 26 ft/s 25 ft/s 28 ft/s 28 ft/s 28 ft/s. Customizable Comfort: Featured with 4 modes (Normal/Natural/Sleep/Auto) and 8 speeds from soothing-soft to storm-strong, you can easily customize your comfort at the touch of a button, on the panel or the remote.