Vacuum cleaner equipped with 2 powerful and high efficiency New Generation motors separately switchable. Little weight and compact dimensions with high level performances. Exhaust air filter. High efficiency PTFE cartridge filter (M filtration class) always installed. Model equipped with the “SHOCKING VALVE" system: the semiautomatic filter cleaning system that assures an extreme duration of the filter and stops clogging, saturation and reduction of filtering capacity. Nylon filter, HEPA cartridge filter, paper filter bag (optional).