Dust capacity cloth dust bag - 1.5l.Dust capacity paper dust bag - 2l. Anti-close mechanism for paper dust bag installation. (when the filter bag/dust bag is not installed in the cleaner the front cover does not close completely). Comfortable harness design, the mesh material is used for the back surfaces that touch shoulders, back and waist with a handle convenient for carrying.Telescopic pipe with lock - A locking mechanism has been added to the connection of the bending pipe to minimise the chance of the bending pipe from falling off. Power mode pre-selection with mode memory function