This cordless Ultra Low Penetrating Air (ULPA) vacuum offers self-storage and contained accessories, built-in full filter indicator light, brushless digital motor, 30+ minute run time and 1 hour rechargeable battery It is a powerful vacuum with its 190-watt cleaning power but quiet at only 67 decibels The one gallon ULPA filter is 99.999% efficient at .12 micron and includes three layers of 56 pleat media The three layers consist of one cellulose layer, one high performance glass silicate layer, and one polyester layer The ULPA filter captures everything from hazardous particulate to lead dust/chips-RRP (Renovation, Repair and Painting), silica dust, fiberglass, mold, etc This vacuum includes a permanent heavy duty retention plug to ensure safety when transporting or storing The cordless tool box structure makes this vacuum convenient for applications where corded versions are inconvenient or simply not an option Air Flow 40 CFM Hose Inside Diameter 1" Hose Outside Diameter 1.25" Manufacturer's Warranty 1 Year Motor Stage 3-Stage Noise Level 67 dB Tank Capacity 1 US Gal. (3.78 Litres) Type Dry Voltage 22 V Wattage 190 W