Wet and dry Ermator S-50 Vacuum with two individually tested and certified HEPA filters. 99.99% at 0.3 microns. The S50 has an outlet for power tools. The vacuum starts and stops on demand from the power tool. The 7- second delay on the vacuum shut-off ensures that all dust is emptied from the hose. A variable speed vacuum motor allows the operator to adjust the amperage and suction power according to circuit breaker capacity.