AUTO CLEANING: With automatic filter cleaning, the Bosch VAC090AH dust extractor cleans the filter every 15 seconds to help maintain maximum suction power PERFORMANCE: The included HEPA filter caputres 99.97 percent of particles at 0.3 microns or larger while the included fleece filter bag helps to protect the filter and provides the optimal containment of dry dust and debris OSHA COMPLIANT: Featuring Bosch PRO plus GUARD, an end to end dust collection system to help users move toward OSHA Silica Table 1 dust compliance POWER: With strong airflow and suction power, the Bosch VAC090AH dust extractor delivers a maximum 150 cubic feet of air per minute rate (CFM), with a sustainable maximum 97 in. static water lift COMPATIBLE: With power tool activations users can utilize power tool's switch to turn vacuum on and off; The Power Broker dial will match the suction force to application