Tact, the fully automatic cleaning system, cleans the filter with strong air blasts. It is ideal for long periods of uninterrupted use and constant high suction power. It is fully compliant with OSHA silica dust regulations. Tact system (Auto Filter Clean System) blasts of air clean the filter resulting in lower maintenance costs and a longer filter life ultimately saving you money. On-board storage for all accessories, includes two hooks for the suction hose and power cord. No filters to install or remove. Bayonet and clip connections guarantee easy and secure connection of all accessory parts to the vacuum.