If the blower is running slower, it also runs quieter. An outer sheath of styrene foam is supplied as extra noise insulation. Many schools are still using the 'blow end' of a noisy vacuum cleaner.
The air is drawn from the upper face below the carry handle so rubbish from the floor is not sucked in. A strainer stops unwanted particles from being sucked in and another strainer stops particles from being dropped into the outlet orifice. Supplied complete with flexible hose.