Bosch VAC090A 9-Gallon Dust Extractor with Auto Filter Clean Automatic Filter Cleaning: Cleans filter every 15 seconds to maintain maximum suction power L-BOXX Integration: Instantly creates a mobile workstation Power Tool Activation: Allows power tool's switch to turn vacuum on and off Power Broker Dial: Optimizes usage of the available power and helps avoid blown circuits Wet vacuuming water level sensor: Automatically shuts down vacuum when water reaches a maximum height to protect motor