The Bosch GAS 18V-1 Professional Dry Extractor is particularly suitable for rapid final cleaning and for short applications. It generates two rotational airflows which prevents any clogging this extracts the dust in two stages: The first stage filters coarse dust and collects this in a separate container; the second filters the fine dust. This results in a much cleaner work environment in a shorter period. Bosch Electronic Cell Protection (ECP) will protect your battery against overload overheating and deep discharge to ensure a long lifetime.