BATTERY REVOLUTION: the DEWALT 54 Volt XR FLEXVOLT machine range offers power for the heaviest applications - without cables! Innovative, brushless motor technology - higher performance, more compact dimensions and longer service life Two-filter system with automatic filter cleaning every 15 seconds for consistently high suction power Electronic airflow monitoring - gives an acoustic warning signal in the event of a drop in suction power Approved for dust class M for vacuuming softwood, hardwood and mineral fine dusts >0.1 mg/m3 Can be used for vacuuming wet and dry materials Wireless tool control ready – the integrated wireless module allows the vacuum cleaner to be connected to WTC-equipped cordless tools and automatically starts remote control when the tool is in use.