The quiet flow 4710SQ air compressor is designed to be 1 of the quietest air compressors in the industry having only Decibels of sound. The quiet flow Series is specifically designed for the DIY and homeowner customer. The powerful 1. 0 HP motor operates at only 1680 RPM creating less noise and less wear. The Oil-Free Dual Piston Pump System is engineered for high performance and durability. The cat-4710 Sq air compressor has a oil-free Dual Piston Pump designed to have a life cycle before wear of 3000 plus hours compared to other brands Of air compressors with life cycles of 500-hours or less. The Oil-Free pump allows for use in a variety of temperatures and uneven terrains. The 4. 7 GAL. Steel air tank is lightweight (43 lbs. ) and very easy to transport. This air compressor is ideal for anyone working inside where noise is a major issue.